1Highquality stainless steel material, thickness 4MM special stainless steel for tools, integrated cutting. 2Nonslip soft rubber handle, matte texture, nontoxic new material, comfortable fit and good touch. 3Reserve holes for disassembly and assembly of the crankshaft and crank cover screws. 4Strict quality control and quality assurance, high safety factor, can be used with peace of mind. 5Precise craftsmanship, close nesting, precise plane tooth form, closed loop full occlusion, not easy to slip teeth, suitable for many models on the market. Item Type: Crankset Bottom Bracket Spanner Material: Stainless Steel 1 x CranksetBottom BracketSpanner1. Riders can purchase according to the matching model written on the page, or can measure the outer diameter data and cogging data of the bottom bracket.2. The outside diameter of the bottom bracket is measured at the widest part of the outside diameter of the bottom bracket. Do not measure the inside of the tooth space. 3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.