Daggerz™ brand deck screws are high quality fasteners for wood to wood exterior applications. The coarse threads allows for more material to sit between the threads as the screw is being installed. This deck screw features a flat head with nibs under the head that help prevent spin out. The flat head also allows the screw to self countersink into the wood. The Type 17 point eliminates predrilling and provides smooth installation into hard woods. Additionally, the Tan ACQ Dagger Ultra-Guard Coating passes the 1000 hour salt spray test, provides excellent corrosion resistance, and is approved for use with ACQ lumber.