The cleaning jags for sale here were proudly invented by master Gunsmith David Dentico. We proudly certify that 100% of these products are made and assembled in the US. These jags are the finest cleaning tools you will ever use. They dramatically cut down on mess, smell, expense and cleaning time. In addition to cleaning, our jags are also used for oiling the bore for storage as well as removing oil before firing. Our shotgun jags fit all standard rods with 5/16x27 threads.