Made of high quality anodized Aluminum. Compared with the bottom bracket tool made of ordinary materials, it is strong and durable. It has excellent anti-corrosion and anti rust performance and long service life.Application:Suitable for Shimano bb80, bb5700, XT bb70, BB51, Campagnolo, Chris king, FSA megaexo, hope, SRAM / truvativ GXP, race face X-type, surly, wheels, fulcrum, etcInstallation requirements: ratchet / torque wrench compatible with 3 / 8 inch drive.size:Product outer diameter: 50mmInner diameter: the distance between convex points is 42.54mm, and the distance between concave points is 46.83mmAplicacin:1, Compatibilidad: Compatible with for 16-slot bottom bracket tooling accessories, rated for 44mm ODFits for Shimano BB80, BB5700, XT BB70, BB51 and previous external bearing threaded cupsAlso fits for many external thread types such as Campagnolo, Chris King, FSA MegaExo, Hope, SRAM/Truvativ GXP, Race Face X-style, Surly, Wheels, Fulcrum and moreFits 16-slot rotor disk lock ringsPrecision CNC machined aluminum, anodized and laser engraved for easy identification, features ratchet/torque wrench compatible 3/8inch drive2,Applicable model:Suitable for Shimano bb80, bb5700, XT bb70, BB51,Campagnolo, Chris king,FSA megaexo, hope,SRAM / truvativ GXP, race face X-type, surly, wheels, fulcrum, etcMaterial:aluminumcolour:bluePackage Contents:1 x 16-Notch Bottom Bracket ToolOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.