Dent Fix's Stud Welding Pins are the original pins available with the Spitznagel Stud Welder. The pins are soft and flexible with a steel core for pulling strength, and copper-coated for conductivity and corrosion resistance. The heads are pointed and conically shaped, designed for better cohesion to metal. Each pin is rated up to 400 lbs. Sizes available include 2mm (No. DF-20) and 2.6mm (No. DF-26).