Beaducation Rocket Metal Design Stamp, 8mm Rocketship Outer Space Planets Punch Stamping Tool Hand Stamped DIY Jewelry Crafts Original Metal Design Stamps Rocket Metal Design Stamp - Beaducation Original Design measures 8mm x 4mm. Made from 3/8" square heat-treated tool steel. Beaducation Original Design. 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.