For drilling small diameter holes into various types of timber and man-made boards. High grade High Speed Steel (HSS) for longer life Fully ground Up to 3x the heat resistance of standard carbon steel bits" Drill Dia. mm: 12.0 Total Length mm: 150 Working Length mm: 96 Shank Dia. mm: 12.0 Shank Type: Straight Drill Tip: N/A Material: HSS Steel Timco Brad Point Wood Bit (Size 12mm - 1 Each) in Silver