LBS-1722-140 Universal Laser Bore Sighter, .17 - .22 caliber Boresighting is easier, faster and more reliable than ever before. Simply select the proper adapter (2 supplied), slide on to the laser tool and turn the switch on. The unit projects a laser dot from the center of the bore. Calibrate your sights or scope to match the dot and you're done. This boresighter will put you within 2' of the bull's-eye at 100 yards almost every time. Laserlyte .17-.22 caliber Laser Bore Sighter is designed to work with the popular .17 caliber. This boresighter will accommodate .17-.22 caliber and includes a laser bore tool, 2 adapters (.17 and .22 caliber), carrying pouch, batteries and instructions.