Best Fitness BFVK10 Vertical Knee Raise Freestanding device offers numerous challenging exercises, using resistance of your own body weight to target abdominal, chest, back, and arm muscles Welded steel construction creates sturdy platform from which to perform chin-ups, triceps dips, push-ups, and vertical knee raises Lightweight design allows you to easily move the machine from an out-of-the-way corner to the middle of the room Back pads and arm supports designed to reduce fatigue and discomfort; dip station handles with thick, comfortable grip Includes limited manufacturer's warranty of three years on frame and one year on parts