This professional rotary tool accessory is a versatile 4-Blade Saw Tooth Eccentric Drill Bit designed for wood, metal, and concrete. Crafted from High-Speed Steel, this heat-resistant drill bit ensures durability and precision in your projects. Its carbide alloy material and titanium coating guarantee strength and wear resistance. With 4 cutting edges, this drill bit offers increased opening speed and a longer service life. Suitable for ceramics, granite, tiles, stone, wood, plastic, and concrete walls, this drill bit is a valuable addition to your toolkit. Easily installed in hand drills or electric drills, it is a must-have for DIY enthusiasts and professionals alike. Ensure efficient drilling by adding water to the drilling site.Upgrade your drilling experience with this high-quality and versatile drill bit set.