The Memory-Flex cables are compatible with all Otis cleaning components. Together with the solid brass slotted tips, 100% cotton cleaning patches, a bore brush, and an all-in-one cleaner, lubricant, and preservative, you can now properly clean your firearm from Breech-to-Muzzle. The flexible cables are coated so as to not damage the crown. Thread: 8-32 The Memory-Flex Cleaning Cable features a Large Cal