Ideal for illuminating hard-to-see areas of the chamber, receiver and barrel interior. A bright white LED puts out 15,000 mcd brightness housed in a 5" flex neck that is attached to a machined brass housing. An embedded magnet allows you to attach the Bore Light to any steel component of your gun for hands free use. Uses three LR44 button cell batteries (included). Non-stop run time is an amazing 8 hours.