【Multi -function Bottom Bracket Wrench】Suitable for BB wrench in 39 40.5 44mm outer diameter，16 Notch. Suitable for BB Model：Shimano BB51 BB52 BB70 BB71 RS500 MT800 BBR60 BB9000 BB9100 BB93 SRAM GXP series 【High-quality material】The bicycle multifunctional BB wrench is made of high-quality stainless steel material, which has very good corrosion resistance and is not easy to rust. 【High safety】The surface of the stainless steel bicycle center shaft wrench is smooth, which is not easy to scratch the hand or cause injury, and it is relatively safe to use. Resistant to dust and grime, it is relatively easy to clean. 【Precise Design】Tight biting, not easy to slip teeth, frosted polishing, precision line cutting, not damage bottom bracket; Close loop designed, eliminate opening deformation, straight tooth shape, high utilization ratio of occlusion 【Long service life】Our center shaft wrench has high strength, not easy to be deformed or damaged, and has a long service life. Multi -function Bottom Bracket Wrench，Suitable for BB wrench in 39 40.5 44mm outer diameter，16 Notch