With this revolutionary new Leupold Zero Point Magnetic Illuminated Boresighter, you can get your rifle on the paper faster than ever, recheck your zero, and even record the zero at different ranges and bullet weights, and readjust your scope without the need to fire. This is one of the smallest Leupold Zero Point Magnetic Illuminated Boresighter on the market. This Boresighter attaches to the muzzle with a neodymium magnet. The internal LED light of this top of the line Leupold Boresighter will insure accuracy when you truly need it. Leupold Zero Point Magnetic Illuminated Boresighter has a unique lens aperture system which eliminates point of aim errors resulting from parallax due to extreme misalignment. The leupold boresighter also includes natural backlighting of the target, LED illumination for use in low light settings, and an inch scale for measuring approximate Riflescopes height and target group sizes. Check your zero. Set new ranges. Compatible with any caliber firearm. Energy efficient design yields 25 hours of battery life. Range cards for recording sight-in information are included. The right tools make even the most difficult or tedious jobs easier. Leupold has carefully selected Leupold zero point magnetic illuminated boresighter for its utility, quality, and ingenuity. Whether it will help you mount a scope or get more enjoyment from your time in the field, you can be confident that the Leupold Bore slighter will perform as intended.