The HECO UNIX-top Dielenschraube is a type of screw designed specifically for use on horizontal surfaces, perfect for securing flooring over underlayment. Its unique design features a threaded hole that pulls the underlayment tightly onto the substructure, eliminating creaking sounds and providing a snug fit. With its special tip and precision-cut threads, it easily screws into place, ensuring a smooth installation process and a professional finish. This screw is a game-changer for anyone looking for a reliable and hassle-free flooring solution.