The Park Tool CCW-5 Crank Bolt Wrench is a precision service tool engineered to make tightening and loosening crank arm bolts quick, secure, and damage-free. Whether you’re installing a new crankset, performing routine maintenance, or correcting a loose arm, this wrench gives you the exact fit and leverage needed to work with common square-taper and ISIS/Octalink crank bolt configurations. Built with Park Tool’s legendary durability and accuracy in mind, the CCW-5 helps ensure your crank hardware is seated properly for safe, worry-free pedaling.

Constructed from heat-treated steel with an ergonomic handle, the wrench delivers sturdy leverage without flexing or rounding fasteners. Its precisely machined tip engages crank bolts securely, minimizing the risk of stripping or slippage during service. The comfortable handle provides good grip and control, whether you’re tightening bolts to spec in the workshop or removing them trail-side with a multi-tool and adapters.

Ideal for home mechanics and professional techs alike, the Park Tool CCW-5 Crank Bolt Wrench is compact, easy to store, and built to withstand repeated use. It’s a staple in any bike tool kit — especially when working on older or serviceable crank systems that rely on bolt-on arms rather than integrated axle designs.