Body-Solid Fusion Vertical Knee Raise / Dip Station (FKR)Save space by attaching this VKR station directly to the back of your gym. Build a stronger core and upper body with knee raises, leg lifts, twists and dips. Specially contoured and oversized back pad, arm pads and handgrips add comfort to the abdominal, shoulder and triceps workouts. It's a combination Vertical Knee Raise and Dip Station. For use with the FUSION500 or FUSION600 Home Gyms only.