Features and Benefits 29 Piece Titanium Drill Bit Set for 3/8" Drills; Material: Quality High Speed Steel; Titanium Nitride "tin-coated" surface enhances anti-friction and increases the hardness of the drill bits; Bits can be re-sharpened; Sizes include: 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, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8, 25/64, 13/32, 27/64, 7/16, 29/64, 15/32, 31/64, 1/2; All drills can be used for cutting metal, plastic and wood. Drill bits come in a heavy duty steel case.