This laser calibrator is made of high-quality aluminum alloy, lightweight and durable for long-term use. The device features a highly accurate, non-adjustable design that utilizes infrared light with a tube mechanism for easy and precise alignment. It includes an adjustable adapter with 8 holes, compatible with calibers ranging from 0.177 to 0.50. Features: - Constructed from high-quality aluminum alloy, offering lightweight strength and durability - Radial calibrator design with focused laser beam for improved visibility and accuracy during adjustment - Utilizes infrared light technology with a tube device for reliable and precise calibration - Simple and sleek battery compartment design; tail cap opens easily for battery access - Adjustable adapter with 8 holes fits calibers from 0.177 to 0.50 Technical Data: - Name: Laser Calibrator - Material: Aluminum Alloy - Color: Green - Battery: 1 x CR2 battery (included) - Power: < 5mW - Wavelength: 635nm - Diameter: 4.2mm - Product Size: 166 x 18 x 18mm / 6.54 x 0.71 x 0.71 inches - Item Weight: 60g / 2.12 oz - Packaging Size: 195 x 104 x 30mm / 7.80 x 4.09 x 1.18 inches - Package Weight: 131g / 4.62 oz Package Contents: - 1 x Laser Calibrator - 1 x Screwdriver - 8 x Adapters - 2 x Screws - 1 x Key