BoreSmith Jag Brush, Cal 270, 7, Phos Bronze Bore Brush, Patented Dual-Purpose, for rods Our Jag Brush for rods has phosphor bronze bristles, and it is dual-purpose capable due to its patented two diameters Its rear brushes the bore, and its front, when a patch is wrapped, wipes at the same time Smaller gap to bore wall than that of standard jags/loops Wipes deeper into grooves and reduces rod flex It has a standard 8-32 thread, and it is a rifle length brush also good for barrels removed from semi-auto handguns