The is a knife made from a high carbon railroad spike. The blade is flat ground and about 4.5in long. The whole knife is a little bit longer than 10in. The twist in the handle feels nice in the hand. HC in this case apparently means 1030 which is pretty low carbon content for a knife. While it got to be very sharp, the edge is probably not going to stay that way for very long.
Forging this was a lot of fun and using the spring fuller really helped with separating the steel from the handle and the blade. Making this knife actually didn't take very long. About an hour of forging time, a couple hours of grinding and polishing.