Fisch FSC-011934 Universal Speed Cutter Bit - OAL, 28mm Diameter x 8mm x 90mm Clean, precise pocket holes and skip free clean cutting edge CNC-Diamond ground and centrally ground center point Drop Forged from tool steel, for superior sharp edge retention High performance design with center point, 2 cutters, 2 spurs and reduced cylindrical shank Drill up to 300 holes before resharpening is required; verified by independent test results