Drywall screws are mainly used for variouss gypsum boards, light partition walls and ceiling joists installation. Drywall screws can be used for repairing nail pops. Drywall screws with coarse thread are suitable for the connection between the gypsum board and metal keel. Drywall screws with fine thread can be used for the connection between the gypsum board and wood keel.Drywall screws with the cone-like shape head, also known as bugle head, helps the screw stay in place. without tearing all the way through the outer paper layer. Drywall screws have a sharp point and the point maks it easier to stab the screw into the drywall paper and get the screw started. Drywall screws often have a phosphate coating to prevent corrosion and rust. Drywall screws are made of hardened steel to provide durable and lasting usage. OEM & ODM, customized design/logo/brand and package are acceptable.PL: PLAIN YZ: YELLOW ZINC ZN: ZINC KP: BLACK PHOSPHATED BP: GREY PHOSPHATED BZ: BLACK ZINC BO: BLACK OXIDE DC: DACROTIZED RS: RUSPERT XY: XYLAN Head Styles Head Recess Threads Points We have our own fastener factories and have formed a professional production system from material supplying and manufacture to sale, as well as a professional R&D and QC team. We always keep ourselves updated with market trends. We are ready to introduce new technology and service to meet the market needs.