SupraBar Curl Bar Attachment - Real Time Pronation/Supination while Curling!

SupraBar Curl Bar Attachment - Real Time Pronation/Supination while Curling! Hook this nicely made 23" attachment to any cable machine and freely pronate and supinate wrist joints while curling. You may notice that if you twist your wrist your biceps make a peak. Imagine the gains to be made if you could do this while exercising! This is the only cable attachment designed for such an effective compound motion. Free joint movement reduces stress on joints and tendons.