Forgefix Black Phosphate Coarse Drywall Screws are coarse thread specialist screws on a flexible plastic collated strip designed specifically for use with mechanical screw fastening machines. This product is suitable for use with most makes of collated drywall guns. Advantages of Forgefix Black Phosphate Coarse Thread Drywall Screws Phillips drive head. Screws are made from fully hardened C1022 steel. 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. Bugle head minimises damage to the surface enabling a smoother surface finish. Predominantly used when fitting plasterboard to timber stud work. Dimensions Size: 50mmFinish: Black PhosphateBox Qty: 1000