These very unique dies will take your jewelry making to the next level or more. Great for earing, rings, pendants, necklaces and more. For use with annealed soft metals like silver, gold, copper, brass etc. while using hammer or press. Measures 3 7/8 inch by 3 inch and 3/4 inch thick made of hardened steel. Impression 3 /16" wide approximately 2mm deep .