I purchase this set for use with Chalean Extreme and they work great . good quality product . it be easy and quick to change weight and I have have no problem with they after 5 month of use 3 time per week . couple of thing to note . they do need to be store on a hard service ; place on carpet make it very difficult to change the weight set . only thing I would change would be the grib when hold a single weight overhead with both hand . it be hard to place both hand on or inside the weight and get a comfortable hold . otherwise , for the quality and money spend , this set can not be beat !