Contains 1000 rust-free 1 5/8 inch screws for securing HYDRO-BLOK wallboard and accessories. Specialty head allows for use with either #2 Phillips or #2 Robertson screwdriver bits. Packaged in a plastic stackable bucket with handle and includes one #2 Robertson screwdriver bit. Screws must be used in conjunction with HYDRO-BLOK Washers. HYDRO-BLOK Washers are available in a matching 1000 pc bucket.