The Capri Tools Professional 1/8 in. Letter and Number Stamp Set is made from premium components. We use premium Chrome Vanadium steel that's been differential heat treated to achieve optimal performance and durability: 62 HRC hard stamping end produces high quality imprints and keeps the edges sharp, and 42 HRC tough hammering end excels at absorbing repeated hammer strikes and maintaining durability. Large, true-to-size, and expertly machine letters/numbers ensure the imprints are precise and refined on leather, wood, copper, brass, aluminum and mild steel. Each stamp has engraved sizing and identification on the front side, making is easy to fine the right stamp and the right orientation. Includes 36 stamps: letters A-Z in uppercase, the ampersand , and numbers 0-9. Comes in heavy-duty storage cases. Make precise and refined imprints on leather, wood, copper, brass, aluminum and mild steel Premium Chrome Vanadium steel with differential heat treatment to achieve optimal performance and durability. 62 HRC hard stamping end produces high quality imprints and keeps the edges sharp. 42 HRC tough hammering end excels at absorbing repeated hammer strikes and maintaining durability Large, true-to-size, and precisely machined 1/8 in. letters/numbers Find the right stamp and orientation easily with engraved sizing and letter identification on the front side of each stamp Includes 36 stamps: letters A-Z in uppercase, the ampersand , and numbers 0-9 (interchangeable stamp for numbers 6 and 9). Comes in two heavy-duty storage cases for letters and numbers, respectively