The Dewalt 7 Piece Extreme Auger & Flatwood Drill Bit Set from ITS is a versatile selection of wood drill bits designed for heavy duty use. The Dewalt Extreme Flatwood Drill Bits is a selection of spade/flat bits for working with wood. Each of the heavy duty bits feature a full length heat treatments that provides enhanced durability along with protection against breaking and bending. The robust steel and extra thick shank further adds to the durability of each bit. The ¼” ensures easy and slip-proof clamping while the bevelled outer cut edges enable precise positioning of the drill and a clean hole pattern, even in wood with nails. These bits are ideal for the rapid drilling of holes in hardwood, softwood, lumber as well as wood with nails. The Dewalt Extreme Tri Flute 152mm Auger Drill Bits are a selection of drill bits specifically for drilling larger holes in wood. Each drill bit, 16mm, 20mm, 25mm x 150mm, has three cutting edges that allow for up to six times faster cutting action compared to standard flat bits.. This, along with the tri-flute design, delivers impressive and optimal cutting action along with impressive chip removal. The three cutting spurs deliver a cleaner, faster hole cutting action along with an extended drilling life. The tapered design allows for a faster removal of chips and debris – this results in less binding delivering premium results. The quick-change shank fits standard Quick-Change extensions and 1/4" / 6mm hex bit adapters and excels at preventing spinning.