Chipboard screw is a product that has undergone a heat treatment process and is suitable for installation of electric tools. To a large extent, it can replace the use of ordinary wood screws (wood screws are not heat-treated). At the same time, wood screws are produced by the first proposed method of shrinking rods by navigation marks, which not only saves materials, but also has sharper threads. Fiberboard nails are mostly based on German standards, and the model is mainly DIN7505.