MADE OF HIGH SPEED STEEL (HSS) - BRAD POINT AND TWO SHOULDERED CUTTING SPURS - MUCH LONGER CUTTING LIFE THAN HIGH CARBON STEEL WOOD BITS - ACCURATE, SPLINTER-FREE HOLES - FOR: SOFT WOOD, HARD WOOD, PLYWOOD AND HARDBOARD SET CONTAINS: - - 1X: Ø4 X 74MM - - 1X: Ø5 X 86MM - - 1X: Ø6 X 92MM - - 1X: Ø8 X 117MM - - 1X: Ø10 X 130MM