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 built for lasting performance. - Radial calibrator design with bright, visible laser light to assist in accurate sighting adjustments. - Utilizes infrared light technology with a tube-style device for reliable and precise calibration. - Simple and sleek battery design; tail cap can be opened easily for battery replacement. - Adjustable adapter with 8 different 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 - Beam Diameter: 4.2mm - Product Dimensions: 166 x 18 x 18mm / 6.54 x 0.71 x 0.71 inches - Item Weight: 60g / 2.12 oz - Packaging Dimensions: 195 x 104 x 30mm / 7.80 x 4.09 x 1.18 inches - Package Weight: 131g / 4.62 ozPackage Contents: - 1 x Laser Calibrator - 1 x Screwdriver - 8 x Adapters - 2 x Screws - 1 x Key