ROCK-ON 23305 #9 1-1/4-in Hi-Lo Phillips Round Head Cement Board Screws 800-pk
•Premium corrosion-resistant finish to prevent rust from bleeding into grout. • arsenic and chromium from chemically-treated lumber. •Head Type: Round Head. •Thread Type: High/Low. Your risk from these exposures varies, depending on how often you do this type of work.