these be cheap for the price 180 or pay 350 for bowflex dont hesitate get the bowflex and dont look back ... these look like they select from the top however they have a cheap cheap plastic slide in with a prong like system ... they be frustrate to get the correct weight on both ... I also have the bowflex and wish I could return these and buy the bowflex however they be for my wife so it be what it be ... once lock in they be lock in they be fine ... wouldnt recommend and wouldnt buy again .