The Hilti Insulation Fasteners X-IE 6-50 are high-quality fasteners designed for insulation materials up to 2 inches thick. Made in Germany by the renowned brand Hilti, this pack includes 300 fasteners specifically for insulation applications. With a reliable model that has proven its performance over time, these fasteners are a new old stock item that offers a durable and efficient solution for securing insulation materials in various projects. May not ship in original box. Sells on the Hilti website for $550 plus tax and shipping.