ABS-1S Adjustable Bore Saver Rod Guide for Scoped Rifles Fits .17-.222, .223, .225, .25/250, .220 Swift Calibers, .25-06, .22-250 Fits .22 Centerfire Rifles based on the Remington 700 action, DOES NOT FIT RIMFIRE RIFLES 13 Inch Overall Length Anodized Aluminum Rod Guide Tube with Solvent Port Adjustable Aluminum Locking Collar with Brass Pin O-Rings to Seal the Chamber and Keep Solvents/Oils Out of Receiver Replaces the Bolt Fits Rifles with .695-.700 Diameter Bolts