First. Sorry, but what is it called, that hard steel pencil-like thing used for starting to drill a hole? You hammer on it to make a small dent in the metal before drilling.
Anyway, when hammering on the project is not practical, I'd like to use a rotary tool bit to start the hole. Planning to try the V-shaped high- speed steel bit (125) later today. It's for aluminum and I guess that bit would not be appropriate for steel. I'm wondering if some other rotary tool bit might work for both. I've tried carving/engraving and another high-speed cutter (100) which chattered too much in the aluminum even at high speed. Maybe one of the tungsten carbide cutters bits?