Harden a knife and a wood chisel! Quick Episode. Bang This! with Hosenhoffen

Showing you how to harden an oil cool steel in oil! Like Share and Favourite, it really helps!

[@jurikristjouw]

Nice vid! What is oil cool steel? And should you temper the chisel back to say 260C (500F) and quench it in oil again? I saw that in other video's but I am not a blacksmith. I have some soft chisels I would like to harden again. Thanx