DEWALT Flat Drill Bits are made from high-quality chrome vanadium steel with a ground central point and cutting edges for accurate location and clean cutting. They also have a ground chip breaker to reduce splintering providing relatively clean holes and improved drilling efficiency. Ideal for rapid drilling of holes in wood. Suitable for natural hardwood and softwood, chipboard and other man-made materials. Supplied in a TOUGH CASE+, this is part of a connectable case system that is TSTAK compatible. Individual TOUGH CASES can be clipped together for easy transportation. This 8 Piece Set contains the following sizes: 12, 16, 18, 20, 22, 25, 28 and 32mm.