#9 x 1-1/4" Backer-On - Rock-On Cement Board Screws (750 pack)

• Used to install Hardie Backer, durock, backerboard and cement board

-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

-Used to attach cement board to wood or light gauge steel studs

-Conforms to ANSI A108.11 standards for cement board attachment