Backer-On Cement Board Screws Rock-On No. 9 x Star Flat Head

Backer-On #9 x 2-1/4 in. Star Drive Serrated Head Cement Board Screws (100-Pack)

• Serrated head design for flush seating even at an angle
• Star drive with T-25 bit provides Stikfit for easy one-handed installation and eliminates cam-outs
• Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
• Serrated thread forms require less torque for faster installation
• Patented design allows attaching close to edge on cement board, reducing fractures or blow outs
• Premium corrosion resistant finish
• Use to attach cement board to wood or light gauge steel studs
• Conforms to ANSI A108.11 standards for cement board attachment

Backer-On Rock-On 2-1/4 in. cement board screws are designed for attaching Hardie Backer or equivalent fiber cement backerboard to wood or light gauge steel studs. Backer-On Rock-On patented serrated head design countersinks for flush seating at any angle providing a smooth surface for tile. The Star drive recess with T-25 bit provides Stikfit for 1-handed installation. Backer-On Rock-On screws feature a Climacoat corrosion resistant finish that prevents rust from bleeding into grout and are perfect for use in high moisture areas such as baths showers countertops and floors. Conforms to ANSI A108.11 for cement board attachment. Backer-On Rock-On screws can be installed with a standard impact or drill/driver and T-25 Star drive bit for cement board fastening done right.