<p><b>Midten is a company specializing in outdoor tactical sports products and hunting accessories.</br> For many years, we constantly improve our products and innovated to redifine market standard, committed to providing more products that meet your needs. </br> Your satisfaction is our most vital aim. Please feel free to contact us if there are any problem about our products, we are always here for you!</b></p> <p><b>Specifications:</b></br> Material: Aluminum</br> Laser class: IIIA</br> Laser wavelength: 630-680nm </br> Max. Output Power: ＜5mW</br> Length: 6.3inch</br> Head diameter: 0.62inch</br> Tail diameter: 0.2inch</br> Weight: 38g / 1.33oz</br> Package weight: 135g / 4.7oz</p> <p><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 until 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.</p> <p><b>Package Includes: </b></br> 1 x Laser boresighter</br> 1 x Screwdriver</br> 1 x Allen Wrench</br> 1 x Spare Screws</br> 6 x LR44 Batteries</br>