The SMAI X-Frame Jammer Arms is a super heavy-duty bolt-on for the X-Frame weightlifting rig. Coming in a pair, each Jammer Arm is installed onto the uprights of your weightlifting rig allowing you to perform squat presses, deadlifts, and even bench presses by adjusting the height of the arms to bench level. Adjust your weight by loading olympic plates onto the collar peg for an unlimited range of weight loading. Specifications 4mm Steel Arm Length: 103cm Collar length: 33cm Handle Length: 33cm