Accessories Dry-wall Screw Fine thread drywall screw with bugle head Phil recess is a durable screw used to secure full or partial sheets of drywall to ceiling joints or studs. It is a twinfast thread, case hardened screw with a sharp point. Each box includes one PH#2x25mm magnetic driver bit (carve “Taiwan”). Sand blasted, packed by small plastic bag. *Other specification are available on request Self-Drilling Phil modified heavy duty self drilling screw #2 point also known as Truss Head. This fastener is for multiple layer drywalls, installation and accessory mountings on steel structures. Commonly used in the T-Grid ceiling structure.