DeWalt DWF4100550 Coarse Thread Collated Drywall Screws 3.5 x 55mm Pack of 1000 (10 Packs) The Dewalt DWF4100350 Collated Drywall Screws - Coarse are ideal for fastening to metal drywall profiles. Sharp needle point for fast/easy installation. Bugle head. Black phosphate coating for corrosion resistance. Specially designed strip for easy installation and to prevent screw jams. Suitable for most leading brands of collated screwdrivers. Will fit Dewalt, Makita, Senco and other makes of autofeed screws guns (See specific guns for size capacities). DWF4100550 Features: - Drywall screws with bugle head - Black phosphate coated - Collated per 50 screws - Constant and sharp needle point for fast and easy installation DWF4100550 Specification: - Collated per 50 screws.