Fasten all types of wood decking including Ipe, Redwood, Cedar, and preservative-treated (PT) woods (non-hardwood) with the DeckWise #10 Bugle-Head screw. Use for optimum performance with hardwoods, thermally modified softwoods, PT softwoods and composite decking materials. Pre-drilling is not required except for exotic hardwoods. These T25 drive deck screws swiftly penetrate decking with a Type-17 auger point including coarse threading which pulls boards tightly together. The double countersink flat bugle head has 6 nibs; utilizes a 6 lobe star drive to reduce cam-out and increase torque; and comes as a chipboard thread screw with partial thread and triple spline (one at the beginning on the thread and two at the end of point).