This Body-Solid® Ab & Back Machine (GCAB360) is a unique dual-function machine that allows you to exercise two major muscle groups (the stomach and back) for one great low price. The innovative plate-load design is based on health club single station machines. We even incorporated 2” x 4” mainframe steel from our commercial grade line of equipment for institutional quality. The Body-Solid® Ab & Back Machine (GCAB360) features a full-range cam design which has an easy-to-use pop pin that allows an additional 26 adjustments to increase and control your range-of-motion. Break-through technology lets you tighten abdominal muscles, strengthen your lower back and increase flexibility. The weight plate post on the Body-Solid® Ab & Back Machine (GCAB360) is 1" in diameter.