The TimberTech CONCEALoc Deck Hidden Fasteners 175 Clips R-2461-RBTT are stainless steel hidden fasteners designed for use with TimberTech decking materials. These rectangle-shaped fasteners come in a pack of 175 and are driven with a square screwdriver. The fasteners have a flat head style and a Birch finish, with each leaf containing one hole. These fasteners provide a secure and invisible attachment for your deck, ensuring a clean and professional look.