Wl Professional Steel Calf Stretcher, Adjustable Ankle Incline Board And Stretch Board, Slant Board With Full Non-Slip Surface, 16" X 14", 4 Positions (500 Lb Capacity)WHAT MAKES WL cALF STRETcHER SPEcIAL  Instead of wood or plastic like other boards on the market, WL calf stretcher is made of steel so that it can handle your bodyweight wit..