Bushnell Banner Laser Boresighter w/Case And Set Of Three Expandable Arbors. These Bore Sights by Bushnell feature a large diameter objective lens for the best resolution and works with a large range of firearms with calibers between .22 and .45. Complete with three expandable arbors and a carrying case the Bushnell Banner Boresighter Kit and Case is all you'll need to get on target and stay on target Specifications for Bushnell Banner Laser Boresighter Kit: Manufacturer: Bushnell Fabric/Material: Metal Package Contents: Bushnell Banner Laser Boresighter Kit Bushnell Banner Laser Boresighter with Case And Set Of Three Expandable Arbors