BOLT STUD 999 1. Since many bolts or pins can be welded to the base metal within a short period, cost can be reduced and productivity can be improved. 2. 1Ø ~ 10Ø steel, stainless steel, aluminum, copper alloy or nickel can be welded 3. Because of instant welding within 0.3-second, there is little heat distortion behind the base metal as well as there is no damage such as plating paint. 4. Outer dimension: 580×300×220