Box of 200 M3 X 25mm black drywall screws. Coarse thread specialist screw with countersunk Phillips head. Screws are made from fully hardened C1022 steel and black phosphate finish. Uses include drywall applications, fitting plasterboard, fibreboard and other types of insulation boards to wood or steel studding. Extra deep insert bit recess offering a firmer positive drive. Extremely sharp piercing point. Thread gives speedy insertion and improved holding power. Bugle head allows the screw to sink effortlessly into the dry lining without the need for countersinking, and minimises damage to the surface enabling a smoother surface finish.