The pliers punch holes in soft sheet metal (copper, gold-filled, sterling silver, and brass) up to 22 gauge. They create a smooth, clean hole without barbs or rough edges. Plus, with the gauge guard, the area around the hole will be free of unsightly indentations. Ideal for cold connections & creating pendants. Creates a smooth hole with no rough edges or dents in sheet. Extra-long jaws for extended reach. One bonus replacement pin included.