Backer-On #9 x 1-5/8 in. Star Drive Serrated Head Cement Board Screws (140-Pack)

Backer-On Rock-On 1-5/8 in. cement board screws (140 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.