This metal stamping kit will stamp all forms of mild steel without a hammer. This is important because hammers have a tendency to double stamp. Also, with a whopping 5000LBS of direct force this stamp system gets the job done with one direct hit. The perfect stamping system! Features: 39 piece metal stamp kit features easily interchangeable alpha numeric bits Includes square driver and characters A-Z, 0-9, *, & Heavy duty case with foam lining for easy storage and organization Permanently stamp all forms of mild steel and most other surfaces 5000 LBS of impact striking force Lifetime guarantee & Made in the U.S.A. Benefits: Hammerless technology will not double stamp Permanently stamp all forms of mild steel and most other surfaces Patented interchangeable bits offer outstanding precision and control Perfect for anti-theft identification and to stamp tools and other property Does not damage or scratch metal or aluminum surfaces Ideal for aircraft/avionics applications, military, automotive restoration, manufacturing, fabrication and more