MTM Long Actions 17 to 243 Caliber Bore Guide for Bolt Action Rifles For .17 to .243(6MM) calibers; Fits Remington 700, 788 long actions, Winchester 70 short actions, Savage 110, Weatherby Mark V long actions & Vanguard actions, Ruger 77 long actions Assures perfect alignment of a cleaning rod to the bore Prevents solvent contamination of magazine and trigger mechanism Protects a rifle's finish If you're serious about cleaning your rifles these are a must!; Made in USA