These Pro-Twist drywall screws are used when installing gypsum board to wood studs. They have a sharp point to pierce through drywall and a coarse thread design to help grab into wood studs. Once the screw has been driven, the bugle head allows for quick and easy countersinking.Made of steel construction in ISO 9002-approved millsPhosphate coated to make driving easier and to provide a good base for finishesNumber 2 reduced Phillips drivenFor interior useIncludes 2 free bits. Cancer and Reproductive Harm in. www.P65Warnings.ca.gov