Notching the Heads
Now we will begin shaping the heads. The first step is to cut two small notches on the head starting about 1/8” [3 mm] from the bottom score line and ending at that line. This is done with a sharp X-Acto knife. Go slowly and take off a little material at a time. The photo on the left shows the starting point of these notches. On the right is the notched key head.