A Must Have For Jewelry Wire Work .Harden And Flatten Your Wire Creations With Precision , Heavy, Solid Steel.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.