The CED Micro Bore Light uses a single "AAA" battery and produces a stronger brighter beam of light. A mere 3.25” (8.4cm) in length, Fiber optic light provides a high intensity beam of light for easy viewing of the bores of handguns, rifles and shotguns and more! Makes checking for leading, fouling, scratches, pits, and rust fast and easy. Great for safety checks and for lighting hard-to-get-at-areas. Ideal for regular firearms maintenance or for examining used guns prior to purchase. A useful tool for clear inspection under any condition. Exclusively designed and produced by CED, the Micro Pocket Bore Light comes with ON / OFF button & belt / bag attachment clip.