Function:<br> ---This laser bore sight is designed for sighting in your rifles and pistols.<br> ---There are 9 bore adapters, can be applied to all .177-.54 caliber rifles and pistols. <br> --- By projecting a laser beam from the center of the barrel axis of your firearm, this laser bore sight collimator allows you to instantly and accurately set your sight or scope.<br><br> Specifications:<br> Material: Aluminum<br> Length: 6.3inch<br> Head diameter: 0.62inch<br> Tail diameter: 0.2inch<br> Laser wavelength: 630-680nm <br> Max. Output Power: ＜5mW<br> Laser class: IIIA<br> Color: Red<br> Weight: 38g / 1.33oz<br> Package weight: 135g / 4.7oz<br><br> <b>How to use it?</b><br> A. Assemble the battery into the bore sight.<br> B. Select the proper adapter that fits in the barrel of your firearm.<br> C. Assemble the adapter on the small end of the laser bore sight, then screw the adapter tight to maker bore sight is inserted in untill it is sung with the crown of your firearm.<br> E. When you press the switch button, a bunch of red beam will be emitted.<br><br> <b> Package Includes: </b><br> 1 x Laser bore-sighter<br> 1 x Screwdriver<br> 1 x Allen Wrench<br> 1 x Spare Screws<br> 6 x AG13 Battery<br> 9 x Bore adapters<br><br> Caution: <br> Keep bore sight laser pointing away from eyes.<br>