The Park Tool CNW-2 Chainring Nut Wrench is a specialized service tool designed to make removing and installing chainring nuts quick, secure, and damage-free. Whether you’re changing chainrings, servicing a crankset, or performing drivetrain overhaul work, this wrench pairs with a compatible crank bolt tool to hold the back of the nut stable while you turn the front — preventing slippage and rounding.

Constructed from durable heat-treated steel, the CNW-2 features a precision-formed head that fits common chainring nut sizes, giving you confident engagement and leverage during use. The long handle provides sufficient torque for stubborn or tight nuts, while its compact footprint makes it easy to carry in a workshop drawer or tool roll. Combining the CNW-2 with your crank bolt tool ensures efficient, controlled removal or installation of chainring hardware — a valuable advantage when working on multi-ring setups or performing drivetrain maintenance.