Made from 2024 aluminum these arms are made as one solid piece of billet aluminum. No annealing or bending is needed as the offset of the arm is machined in. The arms fit most popular micro sprints on the market currently. The billet right rear arm is processed on our CNC machines before we put a 7/8 broach through it in house on BP Fabrications broach. These come with a 5/16 pinch bolt and a threaded end for your 7/16 rod ends. After all machining is complete these arms are sent out for a black hard anodize on them.