These wheeled walker accommodates users up to 500 lbs. (1762X) and 1,000 lbs. (1762 XL). Nonskid wheels have adjustable spring tension and automatically lock when downward pressure is exerted on frame, preventing the walker from moving ahead of the user.Won’t tip when going backwards. Sturdy 1" steel frame has welded joints and features an adjustable width to accommodate larger individuals. Four wheels with swivel front wheels. Frame designed to glide under bed or chair for independent sit/stand transitions. Fits around standard wheelchairs and commodes for easier transfers. Stands independently when folded. Limited lifetime warranty. Optional seat is width adjustable and retracts for self-storing.