One

Love these things! Makes changing plates for the 1" bars a breeze. Have about 3-4 different sets for all of my bars and haven't had any issues with them. Easy hinge mechanism, decent quality plastic, tight grip to the bar

They work well

Perfect fit. Easy on and off. Durable.

These are amazing. Happy i dound them in the one inch. I dont know why people a re trying to use them on the threaded bar in the pics. But for the regular 1 inch bar they are perfect and hold the weights on. Tested with 25lbs. And they didn't slip off.

I couldn't tell if $19.99 was for a single collar or a pair of collars from the description of this item. The photo shows 2, but the product description's wording sounds like you just get one. Amazon customer service also said that this is for just one collar when I inquired. I had a hard time believing it, why would they sell just one collar? You would need 2 for practically any use. Well, they were wrong. This is a pair of collars, you get a package of 2 for the money. And they are STANDARD sized (1 inch) collars, not OLYMPIC (2 inch) like it states in the product description. LockJaw needs to fire whoever wrote the description. But the collars are WONDERFUL. They fit both smooth and screw on bars very securely. I even have 50 lb plates and use heavy amounts when I bench or squat, no problem. These are lightweight and very easy to use. They go on and slide off with ease, and lock tight. I had previously purchased the spring clips which are a total waste. They were way too tight and very difficult to get on and off the bar. I felt like I was going to eventually scratch the chrome coating off the bar. And the spring clips do not work at all on the screw-type weight bars. LockJaw has made an awesome product here. And $19.99 with free shipping is the best price you will find anywhere. That's why I gambled and bought them, hoping amazon customer service was wrong about how many would be shipped. GREAT PRODUCT, TERRIBLE PRODUCT DESCRIPTION

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.

These worked very well. My bar is 25mm vs 1inch (25.4mm) but the tiny fraction was not an issue at all. The collars slipped on with no problem and gripped strongly once closed. I didn’t test them with heavy weight but it was fine with 30 punds on the bar and seemed string enough to go much higher. I tried anothe Amazon brand before this but their variable rubber spacers caused difficulty getting the collar on the bar and did not hold firmly when closed. As others have noted, these will not work on threaded bars.

Molto robusti nonostante siano principalmente in plastica. Svolgono egregiamente il proprio lavoro.

Works extremely well with my Regular 18" Dumbbell Handle from Fitness Depot. After loading 45 lbs on 1 side, turning the bar vertical with weights facing down and bouncing it there wasn't much movement at all. I'm not sure I could be more satisfied. The picture included is 40lbs held and shook for 30 seconds. Very little movement for completely impractical use. To the people saying they're clamps are moving with as little as 5 lbs on it... there's something wrong with your bar diameter.

Not Delivered a month after latest expected delivery date. Held a 90lb stack of weight when new, so acceptable for dumbbell use.

Does not lock down on my 1 inch barbells? Too dangerous to use if you have speed threads as they will not lock on the threads well enough if you tip a weight, you could end up with a plate on your toe or foot! Expected these to snap down but no.

Arrived and did its job. No more weights crashing on my face.