Drywall screws have deeper threads than regular screws, which prevents them from dislodging easily from the drywall. They are made of steel and require a power screwdriver to drill them into the drywall. High quality galvanized black phosphate gypsum drywall screws for metal and wood We can produce kinds of screws like Drywall screws, Chipboard screws, Truss head screws, Hex head screws. Annealed wire and other steel products. We have 9 wire drawing production lines, 2 heat-treatment production lines, 135 machines for making head, 91 machines for making thread, 23 machines for making tails. It helps us offer a fast delivery time to our customers. Our annual production volume reaches 18, 000 tons. 80% of our products are exported. We Mainly export to Asia, South America, Russia, Middle East and other countries. We also can produce special screws according to our customers' requirements. Stable quality and good services are the development tenet we always adhere do. We will continue to practice win-win promise, commit to joint development with partners and create a better tomorrow together. Hope to see you in our factory. 1. We have several sizes of packing dimensions, can be 20kg or 25kg per carton; 2. Small Box Packing:1kg G.W./Box;20Boxes/Carton 3. Normal Packing: 1000pcs/500pcs/250pcs per small box. then small boxes into cartons.