WeatherBond HPWX Fasteners are used with WeatherBond's HPWX Fastening Plates to secure WeatherBond PRO TPO roofing membranes. The HPWX Fastener may be used on steel or wood decks. The HPWX Fastener is designed to offer an optimum combination of driving performance, back-out and corrosion resistance with excellent pullout values. The HPWX Fastening Plate is designed to attach the roofing membrane from the underside using the HPWX induction-welding tool.