The Hornady Custom Grade Die Zip Spindle Kit Straight Wall is the ideal kit for spare parts, or for updating an older Hornady Sizing die to utilize the new zip spindle design. The Zip Spindle has a series of light threads cut on the spindle and spindle lock. This eliminates slippage and makes tightening the spindle lock a breeze when adjusting. This kit includes 3 decap pins, a zip spindle, a spindle lock, and a decap pin retainer. Fits: Any pistol caliber (straight wall cartridges) Hornady Custom Grade Sizing Dies.