Backer-On #9 x 1-5/8 in. Star Drive Serrated Head Cement Board Screws (575-Pack)

Backer-On Rock-On 1-5/8 in. cement board screws (575 pack) are the premier fastening solutions for installing cement boards. The patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile installation. The star drive recess combined with Stikfit bit supports easy one-handed installations and eliminates cam outs. The premium corrosion resistant finish prevents rust from bleeding into grout, making Backer-On Rock-On screws the perfect choice for use in high moisture areas such as bathrooms and kitchens.

• Serrated head design for flush seating even at an angle
• Star drive with T-25 bit provides StikfitTM for easy 1-handed installation and eliminates cam-outs
• Serrated thread forms require less torque for faster installation
• Patented sharp point offers immediate pick-up and eliminates the need to pre-drill
• 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