Showa Inner Fork Cap Wrench. The HP Tools Showa Inner Fork Cap Wrench is a multi-functional tool for servicing Dual Twin Chamber Showa forks on modern off-road and motocross motorcycles. Used with the HP Tools Fork Cap Wrench 46 / 50 mm, it makes it easy to remove the inner compression body from the outer fork caps and change oil in the fork's inner chamber. A progressive slot holds all common Showa damping rod sizes, allowing removal of the lower cartridge bolt during fork service. Multi-functional fork cap tool for Showa Twin Chamber / Dual Chamber style forks. Simplifies removal of the inner compression body from the outer fork caps for fork oil changes and cartridge service. Progressive slot securely holds Showa damping rods to remove the lower cartridge bolt. Precision fit helps prevent scarring or scratching of the fork cap's anodized finish.