screw system for our plasterboard system.... Drywall screws ... , dowelling and other traditional methods. Self tapping screw: Diameter: 3.5mm(#6),3.9mm(#7), ... Zinc,Yellow Zinc,Packing: Rugular Collated Screws Screw Types: Drywall Screw, Chipboard Screw, Subfloor Screws, and Decking ScrewHead Types ... Black or Gray Phosphated, Zinc Plated, Decromet, Ruspert,Screw Guns Types: Hilti, Makita, etc This is Just ...