Shimano TL-FC11 Cotterless Crank Extractor Description: Genuine Shimano square taper and Octalink crank arm removal tool. Flip the end piece around to match the style of cranks being removed. Features: Professional grade tool made from hardened steel designed for years of use Inner puller will accept a 15mm wrench, a 14mm hex, or an 8mm hex wrench Works on square taper, Octalink, ISIS Drive, Power Drive, or Power Spline bottom bracket type cranksets