Medline aluminum crutches are one of the strongest on the market. Aluminum tubing and a special riveted footpiece provide stability. Like having three crutches in oneyouth, medium and tall. Fits users' heights 4'7" to 6'7". Features a red-dot grip adjustment mechanism. 300-lb weight capacity. Adjustability: 4' 7" to 6' 7"; Size Group: Youth; Adult Medium; Adult Tall; Material(s): Aluminum.