Save time when you mark metal. In one stroke, a series of letters and numbers can be stamped on a product or name plate with uniform legibility. Type holder has spring pin to hold notched type securely. 1/8" and 3/16" holder has a 15 character capacity. 1/4" holder handles 12 characters. Letters, numbers, blanks must always equal full capacity of holder. Kit contains 40 pieces: A through Z, 0 through 9, dash and 3 blank spacers. Packed in a sturdy wooden box with plastic insert for character storage.