Nihowban Red Dot Bore Sight 12GA Laser Boresighter with 3 Sets of Batteries 

• SAFE: Class IIIA laser,Output power less than 5mW.
• LONG RANG Durable: The visible range of laser is as far as 110 yds, the straight red laser beam is easier to identify. and to help you adjust the scope and sight quickly and accurately.
• LONG LIFE: Equipped with 2 sets of batteries(6pcs),double the service time. Sturdy and durable brass construction.
• EASY TO USE: Fastest gun zeroing and sighting device, you just place the boresighter in the chamber simply.
• SAVING: Adjustments to sight in your scopes & sights without firing any ammo. You don’t need to use the extra ammo for honing shooting skills.