Made from 2024 aluminum these 7/8 broach left rear torsion arms fit most popular micro sprints across the nation. They have a 5/16 pinch bolt and a 7/16 thread for your rod end to thread into. They also have a nice machined pocket for your bolt to fit into requiring only one wrench to remove your shock from the torsion arm. Everything is done in house on BP Fabrications CNC machines and is also broached in house as well in our machine shop. After all the steps are complete these are sent out for a black hard anodize.