Feather Metal Design Stamp, 11mm Large Bird Feathers Punch Stamping Tool for Hand Stamped DIY Jewelry Crafts - Beaducation Original Metal Design Stamps Large Hip Feather Metal Design Stamp 11mm - Beaducation Original Design measures 11.35mm x 3.5mm 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.