The sled is driven by nylon bearing wheels that provide a smooth quiet ride on steel rods preventing lateral movement and providing a precise motion * The seat and adjustable back pad along with the adjustable angle foot plate and hand grips lock the user into the position to perform the exercise * The design of the carriage and seat section allow for a leg sled that is significantly more compact than any other in its class * A foot tube is also included to provide calf raises * Weight Capacity - sled: 700 lbs.; Weights sold separately