Low 580°F working temperature rod means you can weld with a propane torch. Works on copper, brass, steel and cast iron. Allows dissimilar metals to be joined when ysing the super flux included with the kit. Meets MIL-S-12204B Type II, Composition B specs. You get a stainless steel brush, easy instructions and enough flux to weld the 1/2 pound of welding rods included (pack of 18-20).