Preferred Materialscrew dowels is refined from high quality carbon steel raw materials. After testing and improvement, the strength and toughness can be ensured. Detailed processingScrews has smooth surface, fine workmanship, no burrs, and electroplated treatment, which improves considerably the resistance to rust and corrosion. Easy to useSelf-drilling screw teeth are sharp enough to penetrate objects smoothly. The transverse groove is deep enough for easy positioning without slipping. High strengthHigh strength screw anchor has good stability and high toughness, and it is not easy to break when He is used. They can be used for wall, concrete and plasterboard fixing. Widely UsedDowels with screws can be used not only as home decoration tools, but also in energy , electronics, electrical appliances, machinery, chemicals, molds and other industries. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.