It's designed to melt and cut the base metal by striking an electric Arc, and eliminate the overabundant part of welding bead by compressed air. 
 
■ Application
1. Gouging a back side of welding part and eliminating a detect.
2. eliminating overabundant part of welding bead.
3. Chipping butt welding.
4. Cutting a iron plate, alloy steel, stainless steel, copper alloy, matnet steel and molding steel.
5. multiplying efficiency in tough and demanding environments such as construction, shiprepair, multi plants, and boiler equipping. 

■  Feature
1. Low electric resistance
2. High stability of Arc
3. High quality because it is made out of graphite powder and refined carbon
4. High conductivity because the case is plated with copper.