BBB has all the best tools & accessories for your bike. This BracketGrip Bottom Bracket Tool (BTL-116) is a professional, double-sided 39/41 mm wrench suitable for selected Shimano centre assembly's. Non-Slip Rubber Handle Featuring an ergonomically shaped, non-slip, Kraton rubber crank handle for a secure & reliable grip this handy tool is extra-long in length (330mm) to provide greater leverage and is made with high quality steel for improved durability. • BBB BracketGrip Shimano Bottom Bracket Tool (BTL-116) • 39mm / 41mm double sided wrench • Ergonomically shaped crank handle • Professional standard tool • Extra-long handle for better leverage (330mm) • Kraton rubber handle for reliable non-slip grip • Handle hole for hanging on workshop peg board wall