Simms HardBite Star Cleat studs are designed specifically for Simms' StreamTread boots. These are the ultimate cleats for ultimate traction on slippery rocks. Each cleat has carbide chips welded onto each arm of the star cleat. They are super sticky and will immediately increase your traction on mossy rocks. Simply use the included screws to attach them to your Simms wading shoes. There are 18 cleats and screws in each package. They are zinc-plated for corrosion resistance and may be used by themselves or in combination with regular Simms HardBite Studs for the perfect combination for your particular conditions. If you need to take them out, simply unscrew them and then put them back in next time you need them. Highly recommended by our staff!