I just finished a three day bladesmithing class with Grant Marcoux in Alameda. He taught me how to make a Nessmuk knife out of O1 tool steel. The blade is hand forged. It has been normalized, oil hardened and tempered. The edge is so strong and sharp that it can cut even steel. The handle is made out of Padauk with a brass guard. Grant taught me how to make the knife step-by-step starting with the O1 round and forging it into rough shape. The class was fun and I have learned to really appreciate how much work goes into making a good knife. Now, I just need to convince my wife that it is okay to set up a forge at home.