BoreSighter Bore Sight kit Multiple Caliber, Laser Sight with Button Switch for .177 to .54 Caliber Rifles Handgun Hunting Scopes with 2 Sets of Batteries (Green Laser)

【Easy to Use & Zeroing】: Emit green laser beam ( Class IIIA laser, less than 5mW ), providing a precise reference for you to quickly and accurately zeroing your scopes, saving your time and money without any ammo.
【Multiple Caliber Adapters】: Laser barrel come with 9 adapters fit 0.117 to 0.54 caliber for pistols, rifles, shootguns, and scopes. So you just choose right size adapter and place the laser unit in the muzzle.
【Upgrade Press Button】: Our latest bore sight not only adds the press switch to convenient to control but also adds the automatically adjust focus function for zeroing.
【Longer Battery Life】: Upgraded the battery of the laser bore sight kit - 2 CR2 battery has ultra-long battery life and longer service life.
【What You Get】: 1 * Green laser bore sight, 2 * 800mAh CR2 Batteries, 9 * Adapters(fit 0.177 to 0.54 Caliber),1 * Screwdriver,1 * Instructions.