Backer-On Rock-On 23505 Cement Board Screw, #9 Thread, 1-1/4 in L, Hi-Lo Thread, Serrated Head, Star Drive, Sharp Point Load Centers trim and underlayment nails

trim and underlayment nails

Checker pattern head blends with wood texture and serves to diffract sunlight

Soothes rough

Another precision feature is tightening mode (T-mode)

This compact tool is handy for overhead applications

Backer-On Rock-On 23505 Cement Board Screw, #9 Thread, 1-1/4 in L, Hi-Lo Thread, Serrated Head, Star Drive, Sharp Point Load Centers trim and underlayment nailsBacker On cement screws are designed for attaching HardieBacker cement board and Rock On cement board screws are designed for attaching Durock cement board to wood or light gauge steel studs. The patented serrated head design countersinks for a flush finish even at angle, providing a smooth surface for tile installation. The T25 star drive recess provides Stikfit for one handed installation. Climacoat corrosion resistant finish prevents rust from