250pcs, #11 PG 1-1/2" or 2" Metal Siding/Roofing Screws, w/Metal & EPDM washer

1/4" Hex washer head reduces the screw appearance on sidewall and roofing sheets. A: Yes these are steel to wood screws, they are made to go through 29 gauge and 26 gauge steel roofing panels without predrilling.