Yes. I used to work in a manufacturing machine shop. You can only drill so far in with a drill and limited to the stroke of the machine and the length of the drill bit. Here comes the step drill procedure. The first hole is say 3/8, then you drill a couple inches further with a 5/16 and then a couple more inches with a 1/4. The last (larger) hole also gives the shavings space to exit the hole.