The Drill-Tec Heavy Duty ASAP 3S is a Drill-Tec Heavy Duty #14 Fastener assembled with a Drill-Tec 3" Galvalume Barbed Plate. The Drill-Tec Heavy Duty ASAP 3S (Assembled Screw and 3" Steel Barbed Plate) is designed to secure single-ply membrane to steel and wood substrates.