Fits Shimano XTR BB91/3/4

3/8 torque wrench

flip them over and crack a bottle of refreshing goodness

This is a standalone adaptor to do just that

Containing no harmful acids

Park CNW-2 Chainring Nut Wrench Do Not Ship Internationally Fits Shimano XTR BB91/3/4The CNW 2 makes chainring bolt set installation and removal easy. It securely holds the slotted nut to prevent spinning when tightening or loosening the bolt. Double ended to fit most slotted type nuts. The outer width of both ends of the CNW 2 are nominally 12mm wide. One end has a two outer tips nominally 2. 7mm wide each, and the other end has tips of 3. 8mm each. The blade thickness is nominally 1. 35mm.