The Wheeler Engineering Professional Laser Bore Sight is constructed of a machined aluminum body with soft rubber over-molding which houses the laser module. It's high-power laser is visible during daylight conditions, and a high strength magnetic connection ensures a solid fit to the barrel of nearly all rifles, muzzleloaders, shotguns and handguns, regardless of caliber. A magnetic connection to the end of a firearm's muzzle provides more precise alignment with the bore while eliminating the risk of damage, which may occur with arbor style bore devices. Each unit is hand tuned during the manufacturing process with an innovative calibration mechanism to ensure the best bore/optic alignment possible, resulting in maximum precision. Once precision calibration is completed at the factory, the laser module is permanently secured in place insuring reliable performance and durability. Included is a rugged plastic storage case and one CR123A Lithium battery Features:Makes initial scope ad...