Reversed Steel Stamp Sets (USA) Using hand or type holder, you can mark plastic or rubber molds, thin metal patterns, forged dies, etc. Stamps produce a reversed impression in the mold, which will make a raised letter when the mold is used. Available either in 27-piece (A to Z plus ampersand, "&") or nine-piece (numerals 0 to 8; 6 is used both for that number and for 9). Made in USA.