Drill-Tec CR Base Sheet Fastener is designed to secure base sheets to a minimum 2" thickness of poured lightweight insulating concrete or various gypsums. The Drill-Tec CR-Base Sheet Fastener with Plate is Factory Mutual and Dade County Approved. The Drill-Tec CR-Base Sheet Fastener with Plate is a, precision formed from G-90 galvanized steel, coated with CR-10, assembled with a 2.75" Galvalume plate. A Pogo Stick or wooden mallet should be used to install the fastener.