Lighter than wood, the standard underarm aluminum crutch provides stability and durability. Double extruded center tube provides additional strength to weight-bearing area. Push-pin adjustment makes it easy to adjust crutch height in 1" increments. Non-skid, jumbo size vinyl contoured tips provide excellent traction. Easy wing nut adjustments for hand grips. Tall adult size crutches for user height 5'10" - 6'6". Weight capacity: 350 lb.