... Spring Ring, Stroner Magnet. Quality Higher&Best Performance Newest Design Quick Release Locking Pin BLB56For various kinds of Fitness MachinesMaterial: Aluminum + SteelSize: Φ ... can make exactly according to client's special request.BLB56 Pin with strong magnet, easy to operate, but better preformance ... with ICON, KAMWAY, ATHLETIC, TECHNOGYM, etc. Any inquiry welcome!! Quick Release Locking Pin