<p><b>Descriptions:</b></p> <p>By projecting a laser beam from the center of the barrel axis, this laser bore sight collimator allows you to instantly and accurately set your sight or scope. This laser will sight your gun in faster than any other method. The process is so simple that it saves you a lot of time. You will only need to fire 2-3 rounds so it will save you money.</p> <p>Find the right adapter for your caliber, shine your laser out to 25 yards, adjust crosshairs to the dot, then go fire your first 100 yard shot. The universal design will fit .177 to .54 caliber. The green dot laser bore sighter will work with scopes, iron sights. </p> <p><b>Specifications:</b></p> <p>- For any .177-.54 caliber scopes</p> <p>- Green Laser Class: IIIa</p> <p>- Wavelength: 532±10nm</p> <p>- Maximum Output Power: ≤ 5 mw</p> <p>- Material: All T6010 High class aluminum alloy</p> <p>- 8 bore adjustable adapters to fit all 0.177-0.54 caliber</p> <p>- Screws already are set in the factory when center aligning</p> <p>-  Aiming distance Range: 330ft/100m</p> <p>- Length: 7.05 in</p> <p>- Head Diameter: 0.775 in</p> <p>- Tail Diameter: 0.157 in</p> <p><b>Package:</b></p> <p>- 1 x Green Laser Bore Sight</p> <p>- 8 x Adjustable Adapter with screws</p> <p>- 1 x CR2 Batteries</p> <p>- 1 x Screwdriver</p> <p>- 1 x Allen wrenches</p> <p>- 1 x User Manual</p> <p><b>Warm Tips:</b></p> <p>1. Keep laser beam away from eyes.</p> <p>2. Before bore sighting , make sure unloaded and the muzzle is pointed at a safety position.</p> <p>3. After bore sighted, make sure turn off the power, remove the bore sight.</p>