WestYosen--In the appearance of the biggest feature is the horn head shape, divided into double line fine tooth drywall screw and single line thick tooth drywall screw, the biggest difference between the two is that the former thread is double thread.​We

Truss Self Tapping Screw are used for all sorts of material including wood, metal, and brick. These screws cannot drill through metal and require a pilot hole to be pre-drilled before installation​,

Hex with Washer Self Drilling Screw come in stainless steel, alloy steel, carbon steel, and other materials that prevent corrosion.​ Commonly used to fasten metal, plastic, and fiberglass roofing sheets to metal or wood structures: the roofing screws wit