Easy push-button height adjustment. Built-in metal ring for durability. Virtually unbreakable stair deflector helps protect against crutch slipping on stairs. Patented I-beam center post limits footpiece rotation to keep push-button accessible. Lightweight aluminum construction with double-extruded center tube for load-bearing strength. Nonskid rubber tips. Height: N/A; Adjustability: 5\'' 2 to 5\'' 10; Size Group: Adult Medium; Material(s): Aluminum.