M-Type Hardened Steel.
- Extremely durable hardened steel.
- Offers the perfect balance of strenght and stiffness
- Bottom bracket tool compatible with Shimano: Hollowtech II, XTR, XT, LX, Dura Ace 10-speed and Ultegra 10-speed, 105 10-speed, Truvativ Giga X-pipes, Race face X-type, FSA Mega EXO, Sram GXP en Campagnolo Ultra-Torque.
- Kraton grip gives a firm hold
