A "Blackscrew," commonly referred to as a gypsum or drywall black screw, is a type of fastener designed primarily for attaching drywall to metal or wood framing. These screws typically have a phosphate-coated, black surface, which gives them a corrosion-resistant finish ideal for indoor construction.
1 inch ,1-1/4inch ,1-1/2 inch, 2inch ,3inch