We've transformed the traditional free-weight plate into a heavy duty rubber, variable resistance ring, better know as the Soloflex Weightstrap. Easy to load, easy to store and they won't hurt you if you drop them. The 330 LB weightstrap set includes: 1 pair each of 5 & 10 lb straps, 2 pairs each of 25 & 50 lb straps and a pair of retainer clips. Weightstraps use the stored energy in the rubber to equal the resistance you'd get with free weights. Rubber protects your ligaments by dampening shock.