Otis brass pierce point jags are caliber specific to ensure a proper fit between the patch and bore. The pointed design keeps your patch centered and allows it to fall off easily once the jag exits the muzzle. The solid brass makeup means that the jag will not scratch or damage your firearm. This 10 pack set includes jags for the most popular rifle & pistol calibers including .17 caliber, .20-.204 cal, .22-.243cal, .25cal-6.5mm, .270cal-7mm, .30cal-8mm, 9mm, .40cal, .44cal and .45cal). Made in the USA, the .17 & .20cal jags are 5-40 threads and .22 cal and larger feature 8-32 threads.