FastenMaster Cortex Fastening System for Trex Fascia - 50 LF - Island Mist. Featuring a TORX ttap drive system and a high-strength setting tool - Cortex screws are easy to install and optimized for use by the PRO contractor.Using the included Cortex Fascia Counter-Boring bit, drill an oversized pilot hole - the bit leaves the perfect amount of space for both the screw and plug.
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