This laser calibrator is made of high-grade aluminum alloy material, which is lightweight, high in strength, corrosion-resistant, and designed for a long service life. The product includes a full set of accessories, ready to use upon arrival and convenient to operate. Features: - Constructed from high-grade aluminum alloy for durability and reliability - Infrared calibrator emits a laser beam with long-distance visibility, bright and clear light output, aiding in precise calibration adjustments - High-precision design requires no initial alignment; the laser allows for convenient and accurate straight-tube adjustment - Battery compartment features a simple, sleek design with a twist-off tail cap for easy access and practical use How to Use the Collimator: 1. Measure the inner diameter of the tube and select a suitable adapter (includes 8 small black adapter heads). 2. Use a cross-head screwdriver to attach the adapter to the tail of the collimator tube. 3. Ensure the collimator is aligned in a straight line by tightening both the battery compartment and the switch securely. 4. Secure the adapter and insert the tail tube into the device, ensuring the switch side faces upward. Mount the unit and align it with the sight or scope. 5. Adjust the sight or scope until the laser dot is parallel to the target point for accurate calibration. Includes: Laser calibrator, 12 adjustable adapters, and accessory kit Color: Red light Material: Aluminum alloy Design: Adjustment-free, with versatile adapter compatibility