21 Piece, Titanium, Metal Drill Bit Set, Includes: (2) 1/16", (2) 5/64", 3/32", 7/64", (2) 1/8", 9/64", 5/32", 11/64", (2) 3/16", 13/64", 7/32", 15/64", (2) 1/4", 5/16", 3/8", 1/2" Drill Bits, 6x Longer Than High Speed Steel, Self-Starting Point, Balanced Double Flute.