liberty imports professional wooden slant board, adjustable incline calf stretch slantboard with full non-slip surface, 16 inches x 12.5 inches, 5 positions (350 lb capacity) (edition 1) liberty imports multi-purpose wood slant board with anti-slip safety treads. ideal for an optimal stretch to your feet, ankles, calves, quads, hips and hamstrings. aids in the rehabilitation of achilles tendon injuries, shin splints, calf strains and other lower leg injuries. slant boards can also reduce knee pain and help recover from patellar tendonitis. slant board exercises can strengthen your ankle and knee joints, increases dorsiflexion, and provides nutrients for your cartilage. daily stretching can deeply reduce knee pain and increase joint mobility. <br><br> switch between 5 positions (15°, 20°, 25°, 30° and 35°) to fit your various exercise needs. this professional model measures 16"(l) x 12.5"(w) x 10"(h). suitable for home use. comes fully assembled and ready to use out of box. exercise guide included. 350 lb. weight capacity