The Trex Hideaway Universal Hidden Fastener Combo Pack is a versatile solution for securely fastening materials with its square shape design. Made of stainless steel, plastic, and steel, this fastener combo pack provides 50 square feet of coverage. The #1 screw size and Phillips drive style make installation quick and easy, while the black finish adds a sleek appearance. Perfect for various fastening needs, this Trex product offers reliable and durable performance.