You need two things to get a zwickey hunting sharp. A new file and a felt tip marker, if you want to get fancy add an arrow holder. Just make sure that your file strokes are machine like and treat all four edges equally. Ending with light even strokes, some like to leave the burr and some like to remove it. I have done it both ways, I cannot tell the difference on which more effective on deer. If you are concerned about initial blood on the ground go with a four blade, but they are a little more challenging to sharpen, just a little. If you really want to hammer something use a Delta four blade. I bought a couple dozen Herters four blades for $10 that were unused, I find them to be excellent as well.