The fascia screws feature star drive recesses and are ACQ approved. Follow the decking manufacturer's recommendation when selecting either stainless or epoxy coated fascia screws. In general, for applications where either corrosion or especially large amounts of expansion and contraction of the fascia material is a concern, use stainless Fascia Screws. The Fascia System is the ultimate fastening solution for PVC and composite deck fascia boards. It is designed to accommodate large amounts of expansion and contraction that can occur with many deck fascia boards. The pre-drilling tool (sold separately) creates an over-sized hole for the Fascia Screw, so that the fascia board hangs from the screw and can expand and contract without putting a large amount of force on the fastener. The Fascia System has been evaluated and approved for use by major decking manufacturers, including Trex and DuraLife. See decking manufacturer's installation guides for changes to application instructions - with the improved performance of the Fascia System (compared to standard deck screws used to install fascia), fewer fasteners may be required. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.