The Hoppes BRL1 is an essential tool for conducting in-depth inspections under any circumstances. Its powerful illumination enhances visibility within the bore, enabling you to quickly identify nicks, scratches, pits, and fouling. Perfect for safety checks and illuminating difficult-to-reach areas, the BRL1 offers a locking feature that keeps the light on during more extended inspection periods. This makes it an indispensable companion while purchasing a second-hand firearm.Please note, this tool operates on two AAA batteries, which are not included in the package.