The drie medical steerable knee walker allows you to get around without crutches for individuals recovering from foot surgery, breaks, sprains, amputation and ulcers of the foot. it can be steered for increase mobility. knee pad can be adjusted tool free from 18.8″ to 21.8″. ez handle height adjustment is also tool free. deluxe dual lever brakes ensure safety. the leg pads have channels which provide added stability and comfort. 8′ casters are idea for indoor/outdoor use. sturdy dual frame adds stability and allows the 300lb capacity.