SUPPLY GUY 5mm Single Metal Punch Design Stamp: Southwest, Made in USA (not a set) (Thunderbird SGI-64) Each precision metal design stamp is made from 1/4" hardened tool steel and is approximately 5mm in size. All manufacturing and production of these stamps is done in the USA. Note: Each stamp is pictured in order of how it displays on the listing starting with the top left and moving to the right and then moving down through each row displayed.