These collars do the job but are a bit harder to fasten and take off than the convenient Muscle Clamps. They are cheaper and more prone to product failure. Below is a picture of a cracked Rogue collar:
Here below is another broken lock jaw collar:
The muscle driver ones have served me well for years….However, muscle driver is no longer in business. Perhaps Rogue have upped their quality? Or maybe browse Bells of Steel to find a good weightlifting collar.