#8 x 1-5/8" Phillips Wafer Cement Board Screw - Dagger-Guard Coating, Pkg 4000Daggerz brand self drilling cement board screws are a high quality screw designed for cement board to metal fastening jobs. These screws are designed to anchor cement board to wood or 25 20 guage metal studs and the wafer head has nibs on the bottom allowing the screw to countersink flush into the cement board. The proprietary Dagger Guard coating passes the 1000 hour salt spray test and provides excellent corrosion resistance that's suitable for