No. 9 X 1-5/8 in. Backer-On Cement Board Screw 575 Piece

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.