GenFast CD-10 Concrete Fastener is a hammer-in, non-threaded fastener designed to secure insulation and membranes to structural concrete. GenFast Concrete fasteners may be used in any GenFlex system for attachment of roofing insulation (using GenFlex Insulation Plates), and attachment of GenFlex Seam Plates, GenFlex Bar Anchors, GenFlex Termination Bars and other accessories to structural concrete.