The uv bore light illuminator is a fast and easy way to check barrels for cleaning or wear.Just insert the short end into the firearm chamber and watch the fiber optic tool light up your bore for inspection.No batteries needed it's ready anytime whether you are at home or in the field.Excellent for.22 centerfire and up great for 9mm.Type: Bore LightQuantity: 2 PackMaterial: Fiber OpticBattery Size: None