1/8" 3mm | 36pc Upper Case Number and Letter Punch Set 1/4" 6mm | 36pc Upper Case Number & Letter Punch Set Made from Carbon Steel | Hardened and Tempered with Sandblasted Finish (26) Upper-case letters, Ampersand (&), and # 0  8 [#6 can be turned upside-down to make #9] Punches Are Approximately 2.5 inch (63.5mm) in Length Each number, letter and symbol measures approximately 1/4-inch (6mm) tall. Measurement reflects the height of the symbol not the depth it will punch into metals.