The hoppe's bore light is a useful tool for clear visual inspection under any ambient lighting conditions.It illuminates the bore fully, so nicks, scratches, pits, and fouling can be seen easily, making it a valuable tool to take along if you're purchasing a used firearm.The bore light is also good for conducting a safety check of the chamber and for lighting up other hard-to-see areas.It uses two aaa batteries (not included).Thread Pattern: PlasticType: Bore LightSize: All Cal/GaQuantity: 1Material: PlasticBattery: AAAEco-friendly: No