#9 x 1-5/8" Quik Drive CB3BLGHL Cement Board Collated Screws, High-Low Thread, C-3 Galvanized, Pkg 1500 Plastic Strip Framing Nails the split-type expansion mechanism on

the split-type expansion mechanism on the working end compresses and exerts force against the walls of the hole

Square-drive recess - reduces cam-out and ensures secure driver engagement

Need a different size

PGTIC2Z-R to Rails – Use Simpson Strong-Tie Strong-Drive 1/4"x1-1/2" SDS wood screws (not supplied)

#9 x 1-5/8" Quik Drive CB3BLGHL Cement Board Collated Screws, High-Low Thread, C-3 Galvanized, Pkg 1500 Plastic Strip Framing Nails the split-type expansion mechanism onStrong Tie Quik Drive CB3BLG cement board screws are designed to quickly and easily fasten dense fiber cement boards to wood. Designed for use with these Quik Drive Attachments PROLDH