Height Adjustable Parallel Bars Rated 2.83 out of 5 Satin-finish hardwood platform with tapered hardwood ends for easy wheelchair access. (2) “anti-slip” treads on each end. NEW Secure Lock System provides even more stability to our sturdy uprights 1 ½” diameter one-piece stainless steel handrails. Heavy gauge black powder coated steel uprights and fittings. Each upright telescopes up in 1 ½” increments and locks into (10) height positions with fail-safe ball-tip locking pin. 3mm top edge for greater durability.