This decking clip set is used to fix composite decking boards. It comes with 200 screws to match the clips. Each clip is combined with 1 screw in the middle. The screws are made of stainless steel 304 so they do not rust or degrade over time. The plastic clips ensure a very stable installation. These clips are also easy to use. Berkfield Home Decking Clips with Screws 200pcs Plastic & Stainless Steel304 in Black