Features: The Bike Bottom Bracket Tool features a 304 stainless steel hardened construction with anti drop, ensuring durability and secure removal of splined/square taper cranksets for professional bike maintenance. Precisions engineered from aircraft grade aluminum and corrosions resistant 304 stainless steel, this compact tool prevents slippage during operations while protecting crank arms and sockets from scratches. Ideal for cycling enthusiasts, craft mechanics, and professional bike repair shops seeking reliability crank removal solution without speciality equipment. Perfect for home garage tune up, roadside repairs, or workshop overhauls – simply pair with a standard socket wrench to effortlessly disassemble stubborn bottom brackets. Compatibility with both splined and square taper bottom brackets, this essential bike maintenance tool combines portability with industrial strength performances for seamless crank systems servicing. Specifications: Dimension:71mm/2.8in Component:Aluminum alloys + 304 stainless steel Package Includes: 1pc Bicycles square center shaft sleeve note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.