SCREW ROCK-ON 9X1-1/4 185CT

Designed for attaching Durock, Wonderboard or equivalent glass-mesh cement backerboard to wood or light gauge steel studs. Patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile. Star drive recess with included T-25 bit provides for one-handed installation. Feature a Climacoat corrosion resistant finish that prevents rust from bleeding into grout. Perfect for use in high moisture areas such as baths, showers, countertops, and floors. Conforms to ANSI A108.11 for cement board attachment.