Eisco Lab Clamp for Lab Stand, Beaker Holder or Flask Clamp - Heat Resistant PVC Coated Prongs for Holding Objects up to 3.5 Inch Diameter - Boss Head Connects to Lab Stand Rods

Really great. Very adjustable, quality and nice looking. I bought 2. I think I'll get 2 more. I use 3/8th all-thread to make a simple grid in my booth.

As a high school science instructor, these work fantastic! I strongly encourage this design for chemistry setups.

These work very well and the PVC makes for a nice grip. Just know that you should not have it holding something like a distillation flask opening as the PVC will melt a bit. You can probably remove the PVC grips if you want to hold a piece of glassware that will be hot, but I have not tried this yet. It would probably be better just to get a cheaper one without PVC if you need that.

Worked and looks will last for a while

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.

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.

I love this clamp. The coated prongs grip flasks and condensers on contact, and very little tightening is required to hold the flask or condenser in place. I also like that I don't have to worry about creating too much pressure on the glassware. I'm always checking the condenser or 500 ml boiling flask to see if there's any danger of them slipping, but everytime I give a little tug to see if I can move them they don't budge while being held with these clamps. I'll eventually stop doing that and realize that these clamps can be trusted to do the job.

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.

Excelente calidad, en todo su material de seguro me llevare otro pronto

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.

Use it for holding my plumbers torch in place furling my furnace. It holds its position really well and withstands 600 Celsius no problem.

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.

Lo compre para hacerme una lampara "casera" y no puedo estar más contento con el resultado... la piza tiene fuerza y agarra perfectamente.