When you are using step drills - simply mark the step you want with a Sharpy - then you see when you have reached your depth.
Wipe the drill with thinners afterwards.
Wipe the drill with thinners afterwards.
Be very careful with gloves around rotating machinery. NOT generally advisable.
You can save that step if you mark the diameter you want with the sharpie, not the one above it. The cutting action will wipe the sharpie mark off the bit as you drill. It does require that you pay enough attention that you don't go any further after the marking has been removed, of course...Wipe the drill with thinners afterwards.