This laser calibrator is made of high-grade aluminum alloy, offering lightweight construction, high strength, corrosion resistance, and long service life. Designed for high accuracy with no need for adjustments, it utilizes infrared light technology and features a straight tube design for more convenient and precise alignment. Includes an 8-hole adjustable adapter, compatible with calibers from 0.177 to 0.50. Features: - Constructed from high-grade aluminum alloy for durability, light weight, and corrosion resistance - Infrared laser provides bright, clear, and visible light over long distances, enhancing calibration precision - Precision-engineered with an adjustment-free design and straight tube for accurate bore alignment - Simple and sleek battery compartment design; tail cap unscrews easily for battery access - 8-hole adjustable adapter fits barrels ranging from 0.177 to 0.50 caliber Specifications: - Name: Laser Calibrator - Material: Aluminum alloy - Color: Red, Green (optional) - Battery: 1 x CR2 battery (included) - Power: Infrared laser