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.?Pediatric crutches for user height 4' 0" - 4' 6". Weight capacity: 250 lb.