Stability and support for stretching lower leg. Rocker stretches Achilles Tendon and Plantar Fascia. Can be used while standing or sitting. Purchase sku 3412 alone, or as sku 3432 with Motion Enhancement System allows patients to safely add resistance while performing lower extremity stretching, strengthening and ROM exercises. Includes light, medium and heavy cords. (this sku is item 3412 without the cords).