Unior Square Taper Crank Puller Pull It Out If you have a square taper bottom bracket, you might need a crank puller to remove your crankset. The Unior Square Taper Crank Puller is made from drop-forged, hardened, and tempered steel for long life. It works with either square taper cranks or splined cranks like ISIS and Octalink with the included adapter. The tool includes a 14mm socket on one end for removing crank bolts with a 14mm hex head. The wrench flats on the tool for both installing the tool to the crank arm and pulling the crank both take a 17mm open-end wrench. If desired, you can operate the puller with a 14mm hex in the same socket used for removing the crank bolts, or you can also use an adjustable wrench in place of the 17mm open-end wrench. Features Designed for a square taper, ISIS, and Octalink bottom bracket Made from drop-forged, hardened, and tempered steel Includes a 14mm socket on one end for removing crank bolts with a 14mm hex head | Unior | Square Taper Crank Puller Black