The J. Dewey ABS-1S Adjustable Bore Saver Rod Guide is designed specifically for scoped rifles providing precise barrel cleaning with 13-inch overall length and compatibility with multiple calibers from .17 to .22 centerfire.ABS-1S Adjustable Bore Saver Rod Guide for Scoped RiflesFits .17-.222 .223 .225 .25/250 .220 Swift .25-06 .22-250 calibersCompatible with .22 centerfire rifles based on Remington 700 action (DOES NOT FIT RIMFIRE RIFLES)13-inch overall length for optimal reachAnodized aluminum rod guide tube with solvent portAdjustable aluminum locking collar with brass pinO-rings seal chamber and prevent solvents/oils from entering receiverReplaces bolt during cleaning processFits rifles with .695-.700 diameter boltsEssential for proper rifle maintenance this bore saver ensures straight rod alignment while protecting your rifle's chamber and receiver from cleaning solvents and potential damage during the cleaning process.