Feature: 1. SUITABLE FOR: Anodic oxidation process, strong texture, beautiful color. Applicable for M7100, M8100, M9100. 2. HIGH QUALITY: Using high strength aluminum alloy material, hardness, performance greatly improved. CNC fine processing, close fitting, fine workmanship, inner teeth and lock ring close fitting. 3. PRACTICAL DESIGN: Double O ring design solves the problem of lock ring damage caused by tool shaking during disassembly and assembly. 4. SIMPLE TO USE: Use with spanner, the disc tool should be used with 32mm open spanner or with TL?BB01 spanner, convenient and practical. Specification: Item Type: 12 speed Direct Mounting Disc Material: Aluminum Alloy Weight: Approx.43g/1.5oz Product Size: Inner Diameter: Approx. 32mm/1.3in, Outer Diameter: Approx. 46mm/1.8in Applicable: for M7100, M8100, M9100, etc. Crankset Package List: 1 x 12 speed Direct Mounting Disc Note: It needs to be used with a 32mm open?end wrench or with a TL?BB01 wrench.