GRAY PHOSPHATE DRYWALL SCREWS: #6 x 1-5/8" (5 POUNDS - Apx. 1134 SCREWS) COARSE THREAD Drywall Screws (or sheetrock screws) gypsum board, sheetrock, plasterboard. Use for all purpose wood screws. Phosphate Coarse Thread Drywall Screws designed for drywall, gypsum board, sheetrock, plasterboard Drywall Screws AKA sheetrock screws, plasterboard screws, Multipurpose Phillips head wood screws Drywall screws can be used as all purpose screws or wood screws: good for medium duty wood screw use If used as an all purpose wood screw, use for interior application. Black/Gray phosphate coating. Drywall screws are a great low cost solution to everyday, non-structural wood screw applications