The Allen Steel Multi-Caliber Laser Boresighter for Rifles and Shotguns is an essential tool for shooters looking to cut sight-in time and improve accuracy. Made from durable steel this boresighter is designed to simplify the sight-in process by projecting a laser dot that aligns your scope or sights with the barrel before firing a single shot. This efficient system ensures precision and saves valuable time at the range. The positive on/off switch enhances battery life while the included battery and mounting screws make assembly simple and hassle-free. Compatible with .177 to .50 caliber rifles and 12 or 20-gauge shotguns the Allen Steel Multi-Caliber Laser Boresighter is a versatile and reliable addition to your shooting gear.