The Tipton Jag Brush set is neatly organized in adurable, hinged box with marked cavities, it’s easy to select the correct jag and brush foryour particular application. Because they are caliber-specific, you can be assured of anoptimum fit to your firearm’s bore for efficient and thorough cleaning. 17 to 45 caliber(does not include 20 caliber). All jags and brushes have 8-32 threads (17 caliber has 5-40 threads and is a standard bore brush). Case Pack of 6.