Slant Board for Calf Stretching Squats Calf Stretcher Incline Stretch Adjustable Wooden Wedge Footrest Professional for Ankle Heel Feet Knees. 5 Position Angle/Height Adjustablers: Features a quickadjust locking system that lets you adjust the stretchangle between 5 position: 15°/20°/25°/30°/35°You canset up the incline board that fits your personal need.Suitable for beginners, veteran athletes for all ages & allbody types.