These gems start as a 7075 aluminum billet and get precisely machined. Then they get a bright hard anodizing and finally laser engraved logos and torque recommendations. We also take the time to put some nice deep finger splines in this tool so you can thread the cup into the frame by hand with those greasy fingers you haven't washed in a while. Then you can use your favorite 3/8" square drive ratchet or torque wrench to tighten it down. This tool is compatible with all outboard bearing cups that the dual sided tool doesn't fit, Campagnolo, SRAM, FSA and older Shimano.