KLEEN-BORE Multi-Choke Shotgun Cleaning Jags Multi-Choke Nylon Jags offer an efficient way of cleaning a bore and choke. Because the petal design compresses when bore cleaning, the patch is continually putting equal pressure on the bore for a better cleaning job. This design allows the dirty patch to compress and pass through a full choke and out the muzzle instead of back into the chamber. The barbed tip secures the patch while cleaning. The #5/16-27 thread will fit all Kleen-Bore shotgun rods.