PrimeSource Building Products Inc. is one of the largest purveyors of fasteners in the world and one of the largest distributors of building materials in North America. Its proprietary product lines include the Grip-Rite family of products and the Pro-Twist Construction Fasteners. The company carries a full assortment of building materials from industry leaders, such as Owens Corning, GAF/Elk, National Gypsum, CertainTeed, Henkel Corporation, Hitachi Power Tools, Akrotex Films and others. PrimeSource Building Products Inc. caters to the needs of lumberyards, STAFDA dealers, drywall supply yards, concrete and construction supply yards, roofing wholesalers, and home improvement centers. It is a member of the Association of Walls & Ceilings International (AWCI), American Hardware Manufacturer's Association (AHMA), National Lumber & Building Material Dealers Association (NLBMDA) and the Lumber and Building Materials Association of Ontario (LBMAO).