XMark  VKR Vertical Knee Raise with Dip and Pull-up Station Power Tower XM-7617 Includes split handle grip, tricep dip handles, push-up handles and vertical knee raise (VKR) Angled ergonomic back pad and contoured arm pads 11-gauge steel mainframe construction with scratch resistant powder coat finish Ultra thick 3" Duracraft cushions offer firm support and double stitched, tear-resistant Duraguard vinyl