The Pro Plug System for PVC is a superior plugging system for PVC decking & trim. It combines screw-down strength with the beauty of a hidden fastener system. This kit is created specifically for scalloped deck boards. This kit includes a template used to mark the deck board in the thickest section. Predrill where youve marked with the included drill bit. Next, set the screw with the Pro Plug PVC Tool and tap in the Trex plug with a hammer. Pro Plug PVC Plugs are made from the original PVC material so they are a perfect match to your PVC decking & trim. The PRO PLUG PVC Tool drives fasteners to the correct depth every time. The No Cam-Out Auto Stop prevents screw recess from stripping.