The good thing about this product is that it firmly grips the shaft, so it doesn't wobble. You can really feel the load. The grip is made of TPE material. Some people might prefer it to be made of iron. This is a matter of personal preference. Other companies' products just hook on, or they're the type that rotate. It can also be used for low pulleys and lat machines. In this case, the V-angle changes, becoming narrower or wider.