From the heavy-gauge steel to the industrial-grade linear bearings, the BodyCraft F660 leg press/hip sled is built to withstand even the toughest workouts. The F660 is equipped with a fully adjustable foot plate that accommodates several angles, but also folds out of the way for hack squats. The adjustable shoulder pads, meanwhile, allow for a wide range of user heights. Add the features together and you have a machine that supports a host of leg exercises, including leg presses, hack squats, donkey squats (in which the weight sits on the lumbar), and calf raises. The donkey squat option is particularly valuable, as it eliminates the spinal compression associated with heavy weights on your shoulders. Other features include industrial-grade linear bearings that never flatten or wear, a weight capacity of 1,000 pounds, and a compact housing that measures only 39 by 79 by 50 inches (W x H x D). The F660 carries a lifetime warranty.