These drywall screws are constructed of steel and come in a black colored phosphate plated finish. They feature a Phillips head drive and a bugle style head. These fasteners are designed to install drywall and Sheetrock, also known as gypsum board, wallboard and plasterboard, and are used by some for the construction of small to mid-size carpentry and wood working projects. This item contains 250 sharp point #8 x 2-1/2 in. drywall screws.