Embossers more commonly known as seals (notary and corporate) come in hand held and desk models. They crimp paper leaving a permanent impression embedded in the document. Notaries use them as to Corporations on official documents. You also see them in gold foil on Diploma's in fly leafs of books to prove ownership and even on party invitations. The older models used two metal plates which had to be mechanically engraved. Newer models use a "Delrin" (hard plastic) insert that is laser engraved. This makes a lighter, less expensive product with the same life span