Metal to wood screws are sealing self-piercing tapping screws made from C1022 steel, case hardened for roofing and siding applications. These #12 and #14 screws are used in high wind areas as well as for replacement or as goof screws . Screws have a type 17 drill point and hi-lo threads which offer faster drive time and greater resistance to pullout. #12 and #14 screws are 5/16 across flats hex washer head with assembled EPDM washer for easy driving and conformance to the metal surface for a secure and long lasting seal. All screws are 1,000 hour salt spray test dacro coated. Colored screwsare powder coated over the dacro base coating. All Acorn International screws are packed 250 pieces in a heavy duty tear-off re-sealable bag, UPC coded and retail ready. All bag and carton labels are trilingual. Cartons are heavy duty cardboard of uniform size.