Bushnell Deluxe 15-Piece Arbor Boresighter Kit Quality optics with stunning HD clarity 100% quality materials used and tested extensively Beautiful design and durability built to last 15-piece arbor boresighter kit Aligns reticle for improved shooting accuracy Includes .177, .22, 6mm, .25, 6.5mm, .27, and 7mm caliber Also offers .30, .32, .338, .35, .375, .44, .45, and .50 caliber Polymer finish; comes with boresighter