The Wheeler Professional Laser Bore Sighter makes it easy to get your firearm zeroed in, with a highly-visible green laser beam that's easy to see by daylight. This bore sightimage is designed by Wheeler Engineering to stay firmly in place with a magnetic connection to your rifle barrel, and it's flexible enough to work with shotguns and handguns as well. Each Wheeler Pro Laser Bore Sight is hand-tuned in the factory for precision calibration and superior accuracy. Don't risk damaging the rifling on your firearm with arbor-style bore sights - the Wheeler Professional Bore Sight can get you on paper without a scratch on your barrel, thanks to the soft rubber over-molding around the laser unit. An aluminum housing insures that this Wheeler Bore Sight will last for years and perform reliably when you need it!