This Laser Calibrator is made of high-quality aluminum alloy material, which is lightweight, high in strength, corrosion-resistant, and durable. The product includes a full set of accessories, making it ready to use right out of the box and more convenient in operation. Features: - Constructed from high-quality aluminum alloy, offering lightweight use, strong structure, and long-lasting durability - Infrared calibrator with a laser beam that provides long-distance, bright, and clear visibility, enhancing calibration adjustment - High-precision design that requires no adjustment; the straight tube allows for more convenient and accurate calibration - Simple and elegant battery compartment design with a screw-off tail for easy access, making it convenient and practical Instructions for Use: 1. Measure the inner diameter of the tube and select a suitable adapter (8 small black tips are included). 2. Use a cross screw tool to attach the adapter to the tail of the collimator tube. 3. Ensure the collimator is aligned straight by tightening the battery compartment and switch securely. 4. Fasten the adapter and insert the tail tube into the device. When inserting, ensure the switch faces upward. Fix the device and perform calibration using the sight or scope. 5. Adjust the sight or scope until the laser dot aligns parallel with the collimator's light point for accurate calibration.