Kit contains 100 plugs of 1/4 inch (6.35mm) diameter with 100 pc 2 3/4” Epoxy coated carbon steel composite screws and auto-set bit drive for Trex composite decking. These plugs are cut from actual Trex deck boards witch will be exact match for your deck project. Auto-set bit drive is designed to drive the screw to the required depth for screw plugs.