Stable& Sturdy: Aluminum is crimped into the unilok grooves of the shaft to prevent unscrewing. Hardened steel lock tite and micro-mechanically locked piston driver interface which ensure would not unscrew.
877-323 883-511 Piston Driver and Aftermarket Piston Bumper Compatible with Hitachi Framing Nailer, hitachi nail gun parts.(Note: The Compatibility Is Just For Reference. Please Compare The Part Number With Your Original One Before Purchasing.)