My wife and the kids went to see her mother, so this week I've been getting a bit of extra shop time. I thought it was time to make my first power hammer tools. So I made a couple of hacks, a flatter and a tenon tool (see the picture with my first two power hammer made tenons ). The first two holes (opposite to the spring side) are for butchering the rest are for rounding. I did them by drilling and grinding. I really don't like grinding due to the noise and dust it produces, furthermore, spring steel is quite slow to drill. So how do you others do the tenon tools? I guess the rounding holes should be easy to forge but how about the cone/oval shaped buthering holes?