Bore Tech’s Centerfire, Bolt Action Bore Guide precisely aligns cleaning rods with the bore & prevents damage to your firearm & cleaning rod. The solvent-resistant, molded rubber nosecones provide a superior seal and prevent bore cleaner from leaking into the chamber and action. Featuring high-quality, CNC machined & injection molded components, the color-coded bore guides fit most bolt action rifles from .17 to .416 calibers. Please note bolt diameter and rod length requirements in the Specific