Sighting in your rifle has never been easier. Select and adjust the proper barrel adapter to accommodate any caliber from .22 to .50, slide into the barrel. Slip the Scope Leveler onto any Cabela’s or LaserLyte boresighter, activate, then line up your crosshairs with the projected laser lines to ensure that your scope is level. Remove the Leveler, adjust your scope or sights to line up on the projected laser dot and you’re done. Crafted from anodized, CNC-machined, aircraft aluminum. Precision-calibrated for accuracy. Check alignment anytime, especially after a rough trip to a remote hunting location. Batteries and instructions included.