Feature 11.22cal to .50cal RED BORE SIGTER is light-weight designed,and easy to use.It comes with 8pcs bore adapters to fit 0.22 to 0.50 caliber.22.This bore sight collimator installs in the barrel of the firearm and projects a red beam from the center of the bore axis,providing a precise reference for zeroing in on your target.Simply choose the caliber adapter and place the unit in the muzzle.Long sighting range; 3.Light weight and durable.Allows for quick and accurate resetting of any sights.33.It lets you check scope alignment anytime.It allows for quick and accurate resetting of any type.(iron,optical,holographic,etc.) 44.Simply choose the caliber adapter and place the light unit in the muzzle.allows for quick and accurate resets sight.55.CAUTION: Avoid direct eye exposure to beam.Specification Material: T6061 High-Grade Aluminum Alloy Color: Black Size: About 166x18mm Diameter: 4.2mm Power: 5MW 8-Hole Adjustable Adapter Suitable For 0.177 To 0.50 Caliber. The Adjustment-Free Range Is More Convenient And Accurate. Battery: 1*CR2 Battery .wang-edit-text{ font-family:"Arial" important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 * Red Aligner 1 * Screwdriver 8 * Adjustable Adapter 2 * Screw 1 * CR2 Battery 1 * Plastic Packaging BoxNote Due to the different monitor and light effect,the actual color maybe a slight different from the picture color. Please allow 1-2cm differs due to manual measurement.