Fisch FSC-321996 7 Piece Set of Universal Speedcutter Forstner  Bits Clean, precise flat bottom holes and skip free clean cutting edge CNC-Diamond ground and centrally ground center point Dropped Forged from tool steel, for superior sharp edge retention. High performance design with center point, 2 cutters and 2 spurs. Set includes 1/4", 3/8", 1/2", 5/8", 3/4". 7/8", 1" in a wooden box Drill up to 300 holes before reshapening is required; verified by independent test results