This rod is tailor made for .17/.204 caliber firearms and is 33". It comes with a phosphor bronze brush, cotton mop and barbed .17 caliber brass jag. With the proper brush it can be used with a .024 caliber firearm. Saf-T-Clad® products are the result of a technological breakthrough in thermal setting resins. These resins are applied in the US on high-grade solid steel rods. This process provides an unbelievably smooth surface for the ultimate in rifling and bore protection.