Motion Pro Clutch Hub Holder The Motion Pro Clutch Hub Holder is designed to securely hold clutch hubs, flywheels, gears, and sprockets. Features: Made from medium carbon steel with hardened jaws Features 8mm spanner pins Jaws open up to 5 inches wide Recommended for square tooth style clutch hubs Replaces OEM Hd-91042 Note: Not recommended for v-groove or half round style clutch hubs. Will not work on clutch baskets with reversed inner clutch hubs where the integrated clutch face-plate is facing outward.