Not every knife blade is created equally – some are harder than others and some need tempering or hardening or if you have modified them, re-hardening.

This video shows you how and explains how to harden  your knives most effectively.

Keeping your knives in optimum condition is critical to them being useful to you when you need to use them.

This video showed you how to harden them safely and while using the proper technique.

Remember, though, when using an open flame and super-hot metal, use the proper protective equipment and do not cut corners.