... like dovetailing, dowelling and other traditional methods. Self tapping screw: Diameter: 3.5mm(#6),3.9mm(#7),4.2mm ... Phosphated,Grey Phosphated,Zinc,Yellow Zinc,Packing: Rugular Collated Screws Screw Types: Drywall Screw, Chipboard Screw, Subfloor Screws, and Decking ScrewHead Types: ... Coating: Black or Gray Phosphated, Zinc Plated, Decromet, Ruspert,Screw Guns Types: Hilti, Makita, etc This is Just an ...