These step drills are not worth the money. Fractional size indicators are almost illegible and appear to be painted on (see attached photos) so they are removed very quickly in use. There are no dimensions for the two-stage drills! They're said to be titanium coated, but that seems to be a color that will wear off on first use. They are also not very sharp and have a rounded corner on the edge. Don't buy, they are not worth your money and time.