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EISCO 3-Finger Lab Clamp with Bosshead Clamp Holder for Lab Stand Rod - PVC Coated Prongs for Holding Objects up to 3.5" Diameter - Beaker Holder, Flask Clamp with Swivel Boss Head

4.6 4.6 out of 5 stars 683 ratings
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Amazon's Choice in Lab Beaker Clamps by EISCO
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Purchase options and add-ons

Brand EISCO
Item dimensions L x W x H 9 x 2 x 3 inches
Color Black Metallic
Style Adjustable
Item Weight 0.35 Pounds

About this item

  • DIE CAST ALLOY || Die cast alloy construction is strong and corrosion-resistant
  • WIDE JAWS || 3-finger jaws on clamp open to 3.5” (90mm) wide for holding a wide range of glassware sizes and volumes
  • PVC COATED PRONGS || PVC-coated prongs provide a strong, slip-free hold that won’t scratch objects. PVC coating can withstand heat up to 100°C for short periods of time but it is recommended you remove the PVC coating for extreme temperature uses
  • SWIVEL BOSSHEAD || Swivel bosshead for rotating clamped objects 360°. Bosshead attaches to rods up to 15mm in diameter. Clamp extends out approximately 5" from rod (not adjustable)
  • GREAT FOR PROFESSIONAL LABORATORIES, CLASSROOMS & HOUSEHOLD || Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use

Frequently bought together

EISCO 3-Finger Lab Clamp with Bosshead Clamp Holder for Lab Stand Rod - PVC Coated Prongs for Holding Objects up to 3.5" Diam
$13.87
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EISCO Chemical Resistant Steel Ring Stand Set - Lab Stand Support with Clamp - 8 Inch x 5 Inch Base, 24 Inch Rod - Use as Gla
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EISCO Dropping Funnel, 500ml - PTFE Key Stopcock, Open Top, Cylindrical - Ungraduated - Cylindrical, Borosilicate Glass
$29.99
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 9 x 2 x 3 inches; 5.6 ounces
  • Item model number ‏ : ‎ CH0688
  • Date First Available ‏ : ‎ January 4, 2013
  • Manufacturer ‏ : ‎ EISCO
  • ASIN ‏ : ‎ B00AWS3QV0
  • Country of Origin ‏ : ‎ India
  • Customer Reviews:
    4.6 4.6 out of 5 stars 683 ratings

From the brand

Previous page
  2. eisco labs trust deliever learne education science laboratory physics anatomy biology edu

    Eisco Scientific started over 50 years ago as a small, family-owned manufacturing company serving the science education marketplace.

    Our mission is simple; to be TRUSTED by educators, researchers, and scientists throughout the world to design, manufacture, and DELIVER products that allow LEARNING and the development of scientific knowledge.

  3. CHEMISTRY & LAB SUPPLIES

    It has been said that if you tipped a chemistry classroom upside down, everything that falls out that is not a chemical is a product we manufacture. That includes beakers, burners, tongs, and anything made of glass, plastic, metal, ceramic or cork.

    PHYSICS

    Whether you are studying forces and motion or Schrödinger’s wave equation, we have the apparatus and experiments you need to study those topics and everything in between.

    BIOLOGY

    Our product line ranges from hundreds of anatomical models, to dissecting equipment, to microscopes and slides.

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Product Description

eisco labs screw adjustable clamp swivel bosshead vinyl coated prongs jaws maximum traction science

Universal Retort Clamp - 3 Prong Adjustable

Die casted alloy clamp retort, PVC coated jaws with boss head which accommodates rods up to 15mm in diameter. Jaws have a capacity of 90mm.

eisco labs clamp 3 prong vinyl coated science chemistry education school classroom lab stand retort

eisco labs clamp 3 prong vinyl coated science chemistry education school classroom lab stand retort

eisco labs clamp 3 prong vinyl coated science chemistry education school classroom lab stand retort

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
683 global ratings

Customers say

Customers like the quality, versatility, ease of tightening, and ease of use of the hardware clamp vise. For example, they mention it's a great product for the price, it holds the flask well, and it allows tactile tighten. Customers are also happy with adjustability.

AI-generated from the text of customer reviews

123 customers mention108 positive15 negative

Customers like the quality of the hardware clamp vise. They say it's a great product, the middle wing-nut does a good job to keep the whole thing from rotating, and it works great for holding things. Some customers also mention that the clamp is very sturdy and well built.

"Works as planned." Read more

"Great deal for the price, very sturdy and all metal." Read more

"Clamp is secure, no-slip grip is reliable. Great product." Read more

"This 3-finger lab clamp works exactly as expected; and a durable quality build...." Read more

27 customers mention27 positive0 negative

Customers appreciate the value of the clamp vise. They say it's a great product for the price, and the quality is excellent. Some customers also mention that the product is easy to use and cheap.

"Great deal for the price, very sturdy and all metal." Read more

"...A: No, but it works as intended and is relatively economical so I’ve given it a 4 star review..." Read more

"...It was perfect for what he needed, and priced right. I would certainly recommend. No issues at all." Read more

"...But given the reasonable cost, I can live with it. I can see myself buying a few more of these in the future." Read more

13 customers mention10 positive3 negative

Customers like the adjustability of the hardware clamp vise. They say it's easy to adjust the burettes at angles that are not straight up and down, has a wide jaw retort, and the arm is durable, accommodating, and simple.

"...constructed uniformly, of good solid material & they are adjustable for both the width and the angle of the glassware being held...." Read more

"...Makes it easy to adjust the burettes at angles that are not straight up and down. We use fairly complicated apparatus setups." Read more

"Very secure retort, with a larger than average jaw opening and adjustable reach (length) make this a favorite fixture to secure my most expensive..." Read more

"...Note: For those who are wondering, the length really isn't very adjustable...." Read more

8 customers mention8 positive0 negative

Customers find the hardware clamp vise versatile and suitable for many applications. They also say it's sturdy and a high utilitarian standard.

"...It was perfect for what he needed, and priced right. I would certainly recommend. No issues at all." Read more

"Seams sturdy and very versatile" Read more

"...Extremely suitable fort my purpose.I have a 500ml capacity glass retort for simple distillation...." Read more

"This is truly versatile tool. Can be used for many applications. I use it in my glass blowing shop..." Read more

7 customers mention7 positive0 negative

Customers find the hardware clamp vise easy to tighten. They say it holds the flask well and allows tactile tightening. Customers also appreciate the clean threads and the fact that it doesn't lose tension.

"...coated prongs grip flasks and condensers on contact, and very little tightening is required to hold the flask or condenser in place...." Read more

"...and another smaller clamp - inexpensive and well made can clamp down surprisingly tight - would recommend." Read more

"...The clamp is most convenient for my requirements.But the price seems to be much more than these items available here in India...." Read more

"Nice clamp, positive action. Grasps the flask well, allows tactile tightening...." Read more

6 customers mention6 positive0 negative

Customers find the hardware clamp vise easy to use. They mention it's reliable, durable, and simple.

"These are the best clamps I own. Easy to use and cheap...." Read more

"...I like the padded grips and the adjustability of the clamp. Easy to use, reliable and the price was reasonable." Read more

"Arm is durable, accommodating and simple." Read more

"Sturdy & easy to use..." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the adhesion of the hardware clamp vise. They mention that the support screw and clamp were binding, the part arrived broken with the clamp T screw in pieces, and the twist bar on the clamp fell off.

"...Then after using it a few times, the twist bar on the clamp fell off and I had to solder it back on...." Read more

"...The only issue is with fit and finish. The support screw and clamp was binding. A little thread chasing with a tap and die corrected the issue." Read more

"The part arrived broken with the clamp T screw in pieces. Cheap composite metal." Read more

3 customers mention0 positive3 negative

Customers are dissatisfied with the corrosion of the hardware clamp vise. They mention that some parts corrode right away and rust very easily.

"...They also corrode readily in either acidic or alkaline fume hoods." Read more

"Solid, secure and nice wide opening. Rusted when used outdoors, but to be expected" Read more

"To of the parts corrodes right away Should be made of galvanized or stainless steal" Read more

Worked perfectly & held up for multiple opening/closing to hold science fair test subject (more than 50 open/close in a weekend)
5 Stars
Worked perfectly & held up for multiple opening/closing to hold science fair test subject (more than 50 open/close in a weekend)
Purchased for my son's science fair project. Got past the school science fair and onto the regional fair. He was using it to hold a PVC "capsule" that was about 2 1/2 inches in diameter; however, he did more than 36 tests, so there was repeated opening and closing of the clamp, as well as making sure the adjustment was accurate for each "test fire" from the chef's butane torch.He had to open and adjust the clamps several times beyond those 36 times. Anyone who's done a science fair project involving materials like this is well aware that you end up doing tests for adjustments, so I'd say he easily adjusted this more than 50 times over a single weekend. Considering how inexpensive it was, I was concerned that the thumb screws were going to show immediate signs of wear and break off (other reviewers have had trouble). It was perfect for what he needed, and priced right. I would certainly recommend. No issues at all.
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Top reviews from the United States

Ignacio
5.0 out of 5 stars Woks
Reviewed in the United States on January 6, 2024
Verified Purchase
Works as planned.
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David C. Frush
5.0 out of 5 stars Very sturdy, all metal.
Reviewed in the United States on September 25, 2023
Verified Purchase
Great deal for the price, very sturdy and all metal.
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Betsy B
5.0 out of 5 stars Sturdy & easy to use
Reviewed in the United States on October 23, 2023
Verified Purchase
Clamp is secure, no-slip grip is reliable. Great product.
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Dr. SR Bischoff
4.0 out of 5 stars Chromatography - recombinant protein preps
Reviewed in the United States on November 17, 2023
Verified Purchase
This 3-finger lab clamp works exactly as expected; and a durable quality build. In my case, I’m loading either anion exchange (AEX) media for plasmid DNA purification or affinity media for purification of recombinant proteins heterologously expressed in microbial cell chassis. Q: Is it the best quality build? A: No, but it works as intended and is relatively economical so I’ve given it a 4 star review (and yes, I am a geneticist and actually purchased the product without any conflict of interest).
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d.a.n.i.
5.0 out of 5 stars Worked perfectly & held up for multiple opening/closing to hold science fair test subject (more than 50 open/close in a weekend)
Reviewed in the United States on January 19, 2018
Verified Purchase
Purchased for my son's science fair project. Got past the school science fair and onto the regional fair. He was using it to hold a PVC "capsule" that was about 2 1/2 inches in diameter; however, he did more than 36 tests, so there was repeated opening and closing of the clamp, as well as making sure the adjustment was accurate for each "test fire" from the chef's butane torch.
He had to open and adjust the clamps several times beyond those 36 times. Anyone who's done a science fair project involving materials like this is well aware that you end up doing tests for adjustments, so I'd say he easily adjusted this more than 50 times over a single weekend. Considering how inexpensive it was, I was concerned that the thumb screws were going to show immediate signs of wear and break off (other reviewers have had trouble). It was perfect for what he needed, and priced right. I would certainly recommend. No issues at all.
Customer image
d.a.n.i.
5.0 out of 5 stars Worked perfectly & held up for multiple opening/closing to hold science fair test subject (more than 50 open/close in a weekend)
Reviewed in the United States on January 19, 2018
Purchased for my son's science fair project. Got past the school science fair and onto the regional fair. He was using it to hold a PVC "capsule" that was about 2 1/2 inches in diameter; however, he did more than 36 tests, so there was repeated opening and closing of the clamp, as well as making sure the adjustment was accurate for each "test fire" from the chef's butane torch.
He had to open and adjust the clamps several times beyond those 36 times. Anyone who's done a science fair project involving materials like this is well aware that you end up doing tests for adjustments, so I'd say he easily adjusted this more than 50 times over a single weekend. Considering how inexpensive it was, I was concerned that the thumb screws were going to show immediate signs of wear and break off (other reviewers have had trouble). It was perfect for what he needed, and priced right. I would certainly recommend. No issues at all.
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3 people found this helpful
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letmepicyou
5.0 out of 5 stars Far better than the clamps that came with my stand.
Reviewed in the United States on June 12, 2023
Verified Purchase
I picked up a basic stand for some of my lab glassware, and while it came with a decent assortment of clamps, I wanted something a bit more "robust" when I set up delicate gear like my spiral condenser. There's a lot of delicate glass there.

This clamp is a world above what came with my stand. If I had to complain about 1 thing, I wish it had a bit more adjustability in the length department. But given the reasonable cost, I can live with it. I can see myself buying a few more of these in the future.
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James A. Nicklas
5.0 out of 5 stars Decent Clamp for the Money
Reviewed in the United States on February 28, 2020
Verified Purchase
After reading the negative reviews on this product I decided to stress test this clamp for myself. If it did happen to break it would be better to find out early on instead of having expensive glassware be damaged. I happened to have a 20 pound calibration weight handy so I put it on the supposed weak areas. After letting it sit for a while I checked for any noticeable stress points and there were none. You do realize 20 pounds is a far greater weight than I would ever subject the clamp to long term and for very good reasons. However the clamp seemed to handle the excessive weight just fine with no damage. Furthermore I subjected the clamp to this stress several times in a row with similar results...ABSOLUTELY NOTHING. For the final test I suspended my new Pyrex 4000 ml Erlenmeyer Flask a few inches above the base plate of my ring stand and let it sit with my hand near the bottom of the flask just in case. The flask did not budge an inch and trust me that big flask is heavy even when empty. I will however concur with other reviewers on the quality of the metal the clamp is constructed of. It doesn't take Enstein level intelligence to tell that it's a cheaper metal just by holding it in my hand. Overall for the money this clamp is an exceptional value and will probably last a long time when used properly.
6 people found this helpful
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C Moore
3.0 out of 5 stars Good value
Reviewed in the United States on August 21, 2019
Verified Purchase
Functions as expected/needed
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Top reviews from other countries

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Jesus Avelar
5.0 out of 5 stars Excelente calidad
Reviewed in Mexico on June 3, 2020
Verified Purchase
Excelente calidad, en todo su material de seguro me llevare otro pronto
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Yorkie Fan
5.0 out of 5 stars Works well and sturdy
Reviewed in Canada on January 21, 2020
Verified Purchase
I have re-ordered this item as I was very pleased with the strength of the grip and the sturdiness of the build. This can support a lot of weight and won't budge on the grip. Highly recommend this item if you need a secure grip on heavy items.
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Mr Whale
5.0 out of 5 stars Decent tool
Reviewed in the United Kingdom on August 3, 2020
Verified Purchase
Use it for holding my plumbers torch in place furling my furnace. It holds its position really well and withstands 600 Celsius no problem.
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Javier R.
5.0 out of 5 stars cumple perfectamente...
Reviewed in Spain on May 11, 2020
Verified Purchase
Lo compre para hacerme una lampara "casera" y no puedo estar más contento con el resultado... la piza tiene fuerza y agarra perfectamente.
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Javier R.
5.0 out of 5 stars cumple perfectamente...
Reviewed in Spain on May 11, 2020
Lo compre para hacerme una lampara "casera" y no puedo estar más contento con el resultado... la piza tiene fuerza y agarra perfectamente.
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Antares
5.0 out of 5 stars Ottima
Reviewed in Italy on January 20, 2017
Verified Purchase
La qualità costruttiva è eccellente, le 3 "dita" gommate forniscono un ottimo grip.
45 euro tuttavia sono troppi, a mio parere, per un articolo di questo tipo. Al momento del mio acquisto costava 16-17 euro.
Al di là del prezzo quindi lo consiglio sicuramente.
One person found this helpful
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