The Ncstar Laser Bore Sighter Set provides precision rifle zeroing with 4 red laser cartridges designed for popular hunting and tactical calibers.Laser Cartridge Bore Sighter Kit with 4 red laser cartridgesCalibers included: 7mm Rem Mag 30-06 .308 Win .223 RemBrass construction for durability and precise fitBatteries included for immediate useEasy to use design for quick bore sightingMatte blued finishEssential for hunters and shooters who need to quickly and accurately zero their rifles without wasting ammunition at the range.