Bushnell 743333 Boresighter with Case & ARbors Boresighter with 3 expandable arbors Will fit .22 through .270 caliber, 7mm to .35 caliber, .35 to .45 caliber Comes with a deluxe carrying case Compact boresighter kit with graduated grid sighting reticle Each graduation is equivalent to 4 inches at 100 yards Includes three expandable arbors and carry case Arbors cover all calibers from 0.22 to 0.45 Limited lifetime warranty