Security seals comply with paragraph S.1.8. of Handbook 44. The flexible wire goes thru holes in the indicator case and then through the seal. The sealing press will lock the wire by crimping the soft metal and emboss the characters on the dies. Sealing press, 5" long, steel construction has vinyl dipped handles. Press comes with mating pair of engraved flat dies for use on lead seals. Each die can have up to 4 letters or numbers i.e., initials on one die, company or year on other die.