This laser calibrator is made of high-grade aluminum alloy, lightweight, high strength, and corrosion resistant. It features a highly accurate, adjustment-free design utilizing infrared light for precise and convenient alignment. The tube-straight-in design enhances usability and accuracy. The battery compartment has a simple, elegant design with a screw-off tail cap for easy access. Features: - Constructed from high-grade aluminum alloy for durability, light weight, and corrosion resistance - Infrared laser provides bright, clear, long-distance visibility for reliable calibration - Adjustment-free, precision-focused design with tube-straight-in alignment capability - Ergonomic battery compartment with removable tail cap Specifications: - Name: Laser Calibrator - Material: Aluminum alloy - Color: Red or green (optional) - Battery: 1 × CR2 battery, 3 V (included)