Beaducation Heart Arrow Metal Design Stamp, 8.75mm Punch Stamping Tool Hand Stamped DIY Jewelry Crafts Original Metal Design Stamps Heart Arrow Metal Design Stamp- Beaducation Original Design measures: 8.75mm wide by 2.75mm high. Made from 3/8" square heat-treated tool steel. Made in the USA. Made to stamp on typical jewelry making soft metals, such as sterling, gold filled, copper, brass, pewter etc. Do not use on stainless steel.