There are three types of OTIS cleaning patches: small caliber, all-caliber, and panoply. The small caliber patches are designed specifically for .17 caliber to .22 caliber rim-fire, and the panoply patches are designed specifically for rifles .30 caliber and up, handguns 9MM and up, and all shotguns. The all-caliber cleaning patches are unique in that one patch cleans all firearms from .22 caliber to 12/10 gauge. Each patch is 100% cotton and can be used up to 6 times, offering 6 new clean surfaces. When attached to the slotted tip, they form a perfectly circular cleaning swab to allow for 360 degree coverage!