The TOPLoc® Fascia Drill Bit from TimberTech is designed exclusively for TOPLoc™ Fascia Fasteners. It overdrives and countersinks the fascia fastener hole in one step which significantly reduces oil-canning. It is compatible with all TimberTech PRO and TimberTech EDGE boards. Note: This bit is not required for installing TimberTech AZEK PVC Fascia. It is recommended for predrilling capped composite fascia boards from the PRO and EDGE collections. It can also be used with Legacy uncapped composite boards (TwinFascia). Style Number: TLOCFASBIT