Holds the stamps so that figures may be stamped on keys in a straight line with even spacing between characters. Features 7 detents to stamp up to 7 characters and 3 rows evenly on a standard key. Secure a key in place and place a stamp into the square hole over the spot where the key is to be stamped. The stamp is held securely in place, ready to be struck by a hammer. Spacing is clearly defined by a spring-loaded detent built into the device. Letter and Figure Stamps are sold separately. .25 square hole fits most 1/8 and 3/32 character stamps. For best results use the HPC stamps. Other stamps may not fit correctly.