This laser calibrator is made of high-quality aluminum alloy, lightweight and durable for long-term use. The calibrator features a highly accurate, non-adjustable design that utilizes infrared light with a tube device for easy and precise alignment. Includes an adjustable adapter with 8 holes, compatible with calibers from 0.177 to 0.50. Features: - Constructed from high-quality aluminum alloy, lightweight and strong for lasting performance - Radial calibrator design emits a bright, visible laser beam to assist in accurate sighting adjustments - Utilizes infrared light technology with a tube system for reliable and precise calibration - Simple and sleek battery compartment design; tail cap opens easily for battery access - Adjustable adapter with 8 hole sizes, fits calibers ranging 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 (visible red laser) - 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