Quick, professional results are easy to achieve with the wolfcraft wood countersink screw setters. This is a replacement drill bit for the #10 and #12 countersinks (2593405 & 2594405)). The 4.5mm tapered drill bit is made from premium, German High Speed Steel. It has wide, parabolic flutes that drill fast and clean pilot holes and the tapered shape ensures a tight fit for screws. Made in Germany. Replacement drill bit for #10 and #12 wood countersinks (2593405 and 2594405)Drill bit is fully ground from premium High Speed Steel (HSS)Bit is tapered to ensure a tight fit for screwsWide, parabolic flutes clear material quickly, drilling fast, clean pilot holes4.5 millimeter drilling diameter47 millimeter flute length80 millimeter overall lengthBright, polished finishMade in Germany