Pack of 1000 DEWALT Drywall Collated Coarse Thread Screws 3.5 x 55mm. The DEWALT Drywall Collated Coarse Thread Screws come with a bugle head which countersinks into plaster sheet without tearing the top layer and will set slightly below the surface for a neat finish. The curved surface under the head gently forms the base material without crushing. A constant and sharp needle point allows for fast and easy installation. Black phosphate finish for better corrosion resistance. The screws are collated into a strip, specifically designed for easy and jam-free installation. Suitable for DeWALT , Powers, HILTI, Makita, Senco and most other competitor screwdrivers. 3.5 x 55mm (Pack 1000)f