Yellow Zinc 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. Yellow zinc screw coating. Drywall Screws are a great low cost solution to everyday, non-structural wood screw applications