Birzman Shimano Hollowtech II BB Socket
Birzman's Shimano BB Socket is compatible with Shimano Hollowtech II or other 16-Notch 44mm External Bearing Bottom Bracket Cups and Rotor Disc Lockrings (including E-Thru Axle Hubs).
- Fits Shimano BB Tool Adaptors
- 1/2" drive compatible
- Material: CNC Machined Hardened Steel
- Dimensions: 55mm x 45mm
