The Body Solid Leverage Squat Calf Machine will help build mass and strength in the thighs, glutes, calves, and lower back. The user can perform squats with up to 300, 500, 800 pounds and more. This is the strongest machine in its class and can handle the heaviest loads with ease. This machine is for Olympic style plates only. This machine features a heavy-gauge diamond plate foot platform which is set to a perfect 20° pitch for optimal development of the quadriceps and glutes. It has an innovative calf raise block that is round instead of square, eliminating the painful edge and providing a deep pre-stretch for maximum calf-blasting workouts. It also features a heavy-duty mainframe which is comprised of extra-large 3"x 3" high tensile strength 12-gauge steel with all-4-side welded construction. It also has DuraFirm shoulder and back pads that are extra-thick and specifically contoured to conform to your shoulders. Weight plates are not included