The definitive industry standard for this style of tool is the Park Tool CCW-5 Crank Bolt Wrench, a dual-sided, heavy-duty workshop tool engineered specifically for 3-piece bicycle cranksets. Its core feature is a 14mm thin-walled socket on one side and an 8mm hex wrench on the opposite side, allowing it to easily service both traditional square-tapered axle bolts and modern splined configurations.

Technical Design & Capabilities

• Thin-Walled Engineering:
  Unlike standard automotive sockets, the 14mm box end is designed with ultra-thin walls. This profile allows it to slide cleanly inside narrow crank arm recesses where normal sockets get jammed.
• 8mm Multi-Utility End:
  The 8mm hex side fits standard recessed crank arm fasteners as well as a massive variety of modern pedal axles, combining two common high-torque jobs into a single tool.
• Extended Vinyl Handle:
  Wrapped in Park Tool's signature blue vinyl grip, the long handle is optimized to deliver maximum hand leverage without flexing. It is ideal for breaking free stubborn, seized bolts or applying deep installation torque.