Master Mechanic, 13 Piece Titanium Bit Set, Contains 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 3 Flats On Shank Reduce Slipping In The Chuck, 135 Point, Titanium Coating Resists Heat & Lasts 3 Times Longer Than Black Oxide, Recommended For Drilling Wood, Plastic, Wallboard & Plywood, For Moderate Use In Soft Metal, Brass, Bronze, Sheet Metal & Aluminum, Organized In A Durable Case, Clamshell.