These solid brass cleaning jags are designed to provide a tight fit between the bore and patch. A pointed tip keeps the patch centered and allows it to drop off when the jag exits the muzzle. All jags have 8-32 threads (.17 cal. has 5-40 threads). Kit includes .17, .20, .22, .243/6mm, .270/7mm, .30, 8mm/338, .35/9mm, .375, .40, .44, .45 jags.