ER70S 6 MIG Welding Wire, Carbon Steel, 0.035 in dia, 44 lb Spool ORS NASCO Carbon construction Works with all IRWIN® Carbon construction Works with all IRWIN® utility knives Upper and lower tongs are made from a high copper alloy for maximum conductivity and strength Top and bottom tip insulators are a molded fiberglass compound and will withstand intensive heat impact Handles are molded from a durable glass filled nylon material with a good heat and impact resistance Oval point screw cable connection is standard on all models or rusty steel Creates a smooth bead appearance resulting in minimal post weld grinding Provides porosity free x ray quality weld