Simpson self-drilling fiber-cement screws are primarily used for attaching fiber-cement board to steel studs. Type 410 stainless steel can be hardened through heat treatment, giving it the ability to drill through metal. It does not offer the same level of corrosion resistance of either type 316 or 305 stainless steel. Warning: Hardened stainless-steel fasteners should not be used with steel framing in environments with high humidity, condensation or other moisture that will be present at the dissimiliar-metal interface.