The Battleship Bicep Developer is an attachment that plugs into any brand of bench with a two inch receiver. Constructed of heavy duty 11-gauge (.120 wall) steel tube, black powder coat, and top quality stitched upholstery for extra durability. Two pivot points automatically adjust to fit a wide range of arm length. Large diameter stainless steel bearing shafts and bronze bushings provide a lifetime of maintenance free service. Accepts both standard and olympic plates with comfortable foam hand grips. The truncated pad eliminates elbow pain while providing full support.