Used in this how-to video:. How to Make a Name Stamped Mother's Necklace. . Durable, smooth surface for work hardening wire or other metal smithing projects. Easy to handle, simple to use. Heavy weight keeps block in place on your work table. Works with most wire gauges Will work with all types of wire, including Gold, Gold-filled, Sterling Silver, Copper. 4 Inch x 4 Inch, 3/4 Inch thick. Item weighs over TWO pounds, so please note shipping costs (below) before ordering.