Backer-On No. 9 X 1-5/8 in. L Phillips Flat Head Cement Board Screws 575 pk

Zinc-plated steel construction Corrosion resistant finish Rolled gimlet drive is easy to start in dense board No pre-drilling necessary Patented/serrated for lower installation torque #2 square drive reduces cam-out Rib design under .375 ultrathin wafer h