The Starborn Pro Plugs for Azek Trim 400 Pack is a superior and easytoinstall plug fastening system for Azek Trim. When used in combination with epoxy coated or stainless steel fasteners and the ProPlug Tool for PVC and Composite, it gives builders the an easy installation with the ability to choose the right screw for a wide variety of applications. The system features the PVC Tool (which drives screws to the correct depth without stripping the screw recess or damaging the deck board surface), star drive fasteners in both epoxy coated carbon steel and stainless steel (Grade 305 and Marine Grade 316), and plugs made from actual deck and trim material. When using the PVC Tool (sold separately), the fasteners create a perfect hole for the matching plug, without predrilling. Note: Standard drills are recommended for use with the Pro Plug PVC Tool and Smart Bit Depth Setter. Impact drivers may not set the screw to the correct depth.