Screw type: drywall screw, subfloor screws, decking screw and chipboard screws.
1. Head type: #2 phillips bugle head, #2 square. 2. Screw size: #6, #7, #8, #9, #10 (3.5mm, 3.9mm, 4.2mm, 4.5mm). 3. Length: 25-75mm. 4. Thread: coarse/ fine thread. 5. Point: sharp point, tek point. 6. Coating: black phosphated, zinc plated, mechanical galv., ruspert, dacrotized, kylaniketc.