The Adult Knee Walker by Drive Medical is a mobility aid that is great for individuals recovering from foot surgery, fractures, sprains, amputations and ulcers on the foot. The lever lock can be adjusted for either right or left-handed use, and it can be easily converted from left leg to right leg use without the use of tools. The mobility aid has a deluxe lever brake ensures user safety and the 8 inch caster wheels provide a smooth ride over most surfaces, making it idea for indoor or outdoor use. The legs and handles can be height adjusted to accommodate most users. Limited lifetime warranty; lifetime warranty on brake cable.