Versico’s Polymer GypTec® Fasteners are glass-filled nylon auger fasteners with a 1" (25 mm) head. Designed to secure insulation and single-ply membrane to gypsum and cementitious wood fiber, Polymer GypTec Fasteners feature a wide buttress thread design for excellent pull-out resistance, and tabs that lock the plate to the head of the fastener. Available in 2½ – 12" (60 – 305 mm) lengths, an internal ¼" (6 mm) square drive ensures fast and easy installation