Strong Practicality -- A combination set of 6 specifications, 3-step drill bits and 3 serrated drill bits, meet your various needs and improve work efficiency. Accurate & Efficient -- Combination of multi-grid drilling of the pagoda drill bit and the sharp edge of the serrated drill bit to facilitate removal of cutting waste when drilling, preventing iron chips or sawdust from scattering, make drilling faster, more accurate, smoother and more efficient. Made of high-quality bearing steel, titanium-plated surface, anti-oxidation, no rust, wear-resistant, long service life. Easy to carry - The most commonly used drill bit size, light and small does not take up space, can be stored in your toolbox and used anytime, anywhere, convenient and fast. Wide Application: Titanium coating makes it easy to cut steel sheet, aluminum sheet, copper u0026 plastic u0026 wood board and many other types of sheet metal, including tiles. , concrete, tile, brick, wood, plastic, glass, masonry, etc. Wide