GRK RT ProPak TRIM Head Composite Deck Screws, 9 by 3-1/8-Inch, 348-Count #8 trim screws use bit T-10; #9 trim screws use bit T-15 Self-tapping, TRIM head screws; W-Cut thread design One pail contains 348 screws Climatek coated for all weather corrosion protection conforms with ICC#2442 RT series screws for composite decking