PAM Fastening. PAMDrive composite deck screws are now available in bulk 350- or 1,750-count packages. Suitable for decking, railing, fencing, and other composite material applications, the screws feature a dual-thread design that helps pull the deck board and joist together. The head design helps eliminate mushrooming. Available in 21/2- or 3-inch lengths, PAMDrive screws come in brown, gray, tan, or red coatings to complement most composite decks. 704.394.3141. www.pamfast.com.