Medline Industries Guardian® Medium Adult Aluminum Push Button Crutch 44-1/2 to 52-1/2" Adjustment Range, 5ft 2" to 5ft 10" Adjustable User Height, Double-extruded Center Tube, Latex-free Guardian® Aluminum Push Button Crutches feature a double, extruded center tube that provides load-bearing strength where it is needed the most. The special foot piece utilizes durable rivets to secure the aluminum tubing from the inside, providing more stability. Their long, virtually unbreakable, stair deflector helps protect against the crutch slipping on stairs. Guardian Aluminum Push Button Crutches are lighter than wood crutches due to their aluminum construction. Special foot piece utilizes durable rivets to secure the aluminum tubing from the inside, providing more stability than plastic connectors. I-beam center post limits foot piece rotation to a 1.4 turn, always keeping the push-button in view and facilitating easy adjustment. Built-in, metal ring helps prevent excessive wear and ensures maximum durability. Helps increase stress tolerance at all angles without cracking. Packaged completely accessorized, no assembly required. Nonskid, rubber tips provide good traction."