screw system for our plasterboard system.... Drywall screws provide the kind of ... the need for complicated, time consuming and sometimes expensive joinery systems like dovetailing, dowelling and other traditional methods.Self tapping screw: Diameter: ... Thread.Point: Sharp Point, Self-drilling Point.Coating: Black or Gray Phosphated, Zinc Plated, Decromet, Ruspert,Screw Guns Types: Hilti, Makita ...