One

Works great. Very secure

Perfect fit. Easy install.

These are great collars. They're heavy duty and fit really well

Barbell lock fits perfectly on my 1 inch equipment

Easy to use. Great grip on the bar.

Okay these get a 5 star only because I was able to use them on my dumbbells, and not my barbell. You see these are supposed to fit a thicker size 1 inch bar. I didn’t know that there were thicker and thinner bar sizes. It doesn’t work on your thinner style 1 inch bar, but great on the thicker. If you think yours make be one of two lock jaw does sell the smaller bar ones too! I got these for dumbbells and they are good quality and built nice wish the advertising was a bit for clear but it’s okay I caught it.

The product seems to be well made, and of adequate strength for the application (which worried me a bit because it's mostly plastic rather than steel). It would probably work just great on a solid 1" metal barbell. My bar has long threaded ends, onto which a nut is spun to hold the weights in place. This method is very secure, but can be time-consuming to spin the nut over nearly a foot of bar to add or remove a weight - times two, for each end. So this clamp seemed like the perfect solution. Unfortunately, even though the outer diameter of the bar ("major diameter of the thread") is a standard one inch, the clamps would not lock securely onto the shaft. They weren't loose enough that the weights would uncontrollably slide off, but they weren't held snugly against the stop collars either. I've temporarily allayed the problem by adding an inner layer of thick tape to the rubber clamping surface, but I'll be replacing these with the traditional (harder to use) metal heliacal spring type. To be fair, the description for these clamps makes no mention of threaded bars, although other brands of the same type of item do. Again, these may work just fine on a solid bar, but didn't meet my needs.

These are a VERY high quality solid clamp for the price. From my experience in the gym with a variety of other brand barbell quick release clamps I can tell you these really do LOCK onto the sleeve. I would HIGHLY RECOMMEND the Lock Jaw brand over other lesser OR equally expensive brands from my own personal experience where Lock Jaw just holds tighter, holds longer and on a wider variety of bars than the rest. I'd have to say that I'm Completely Satisfied with this Lock Jaw product line and that's saying A LOT these days with all the competition that's out there.