Special lock nut tool/ puller FORCE designed for tightening/ loosening of left crank for integrated bottom bracket Shimano Hollowtech II tightening torgue: 0,7-1,5 Nm in clockwise direction for hand use only - serrated edge for better grip compatible with 8 mm hex key - for loosening only! can be attached to the wrench by integrated magnets designed for wrench 89515 material: nylon with glass fiber, weight: 10 g packed on FORCE card