The Body Solid Seated Calf Raise Machine was created to increase calf muscle interaction and speed the rate of development. This machine features a unique foot platform design that eliminates stress compression on the ball of the foot while providing maximum range of motion. It is designed for a 3:1 weight ratio and pivots on precision pillow block and sealed ball bearings for smooth friction-free movement. The main frame is constructed of 2" x 3" 11-gauge high tensile strength steel, carrying the heaviest loads. The seated calf raise machine also has thick DuraFirm padding on the seat and for the knees providing comfort during workouts. Olympic adapter sleeves, weight plates and collars are not included.