Backer-On No. 9 S X 1-5/8 in. L Star Round Head Cement Board Screws 140 pk

Backer-On Screws provide the optimal fastening solution for installing fiber cement board to wood or steel framing. Backer-On Cement Board Screws conform to ANSI A108.11 Standards for cement board installation.
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, drastically reducing fractures or blow outs
Premium corrosion resistant finish
Use to attach cement board to wood or light gauge steel studs
Ideal for use in high moisture areas such as showers, backsplashes, countertops and floors