"These Hobart Stick Electrodes are designed for use in all positions on low, medium and high-carbon steels. 70,000 PSI tensile strength. Ideal for out-of-position welding and tacking. Runs on AC or DCEP reverse polarity. Not recommended for low-voltage AC welders. Compatible With Carbon steels, Welding Processes Out of position welding and tacking, Welding Rod Type 7018, Product Type Welding rod, Rod Size in. 1/8."