Micnaron Red Laser BoreSighter Bore Sight Kit for .177 to .50 Caliber Rifle Scope Handgun Red Dot Boresight Kit Set Tools Accessory with Rotary Switch -0.177 0.22 to 0.50 Bore Sight Set

Instructions: 1.To select the proper adapter, find the largest diameter adapter that fits in the muzzle of your firearm. 2.Then screw the adapter into the small end of the laser emitter using the small in the center of the adapter. 3. When you turn the laser on, a small red laser dot will be emitted. And then you can adjust your scope's wind age and elevation so that your cross hair aim at the red dot. Warm Tips: Keep boresight laser pointing away from eyes. Before boresighting your scope, make sure that the firearm is unloaded and the muzzle is pointed in a safe direction. After the firearms is boresighted, be sure to remove the boresighter from the gun. Package Includes: 1 x Laser bore sighter 3 x Spare screws 8 x Adapter tips 1 x Padded storage box 6 x Lr44/14250 batteries Specifications: Max. Output Power: < 5mW Weight: 1.34 oz / 38 g Material: Aluminum Length: 6.1" / 155 mm Length of rod that fits into the barrel: 2.4"- 3.5" / 60 mm - 90 mm (tapered) Head Diameter: 16 mm Tail Diameter: 5 mm Laser Wavelength: 635 - 655 nm