Tipton 12-Piece Ultra Jag Set. Contained in a durable hinged box with marked cavities its easy to select the correct Ultra Jag for your particular application. Because they are caliber-specific you can be assured of an optimum fit to your firearms bore for efficient and thorough cleaning. 17 to 45 caliber (does not include 20 caliber). All jags have 8-32 threads (17caliber has 5-40 threads). Specifications for Tipton 13-Piece Ultra Jag Set: Manufacturer: Tipton Projectile Caliber: .17 Caliber Features of Tipton 13-Piece Ultra Jag Set 13 piece caliber-specific set of Ultra Jags Package Content Tipton 13-Piece Ultra Jag Set Tipton 12-Piece Ultra Jag Set 500012