This is the Park Tool CNW-2 Chainring Nut Wrench. The 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.
This product was added to our catalog on July 25, 2014