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 Materials: Aluminum.