Features: Experience unparalleled cutting power with our 4blade serrated eccentric drill bit, designed to effortlessly penetrate toughly materials like tile, ceramic, glass, marble, and concrete. Crafted from steel, this drill bit boasts high wear resistance and durability, ensuring a long last performances in demanding environment. Suitable for DIY home renovators, professional construction workers, and artisans who frequently work with hard materials requiring precise drilling. Perfect for home renovations, construction projects, and artistic creations, whether you're installing fixtures in the kitchen or crafting intricate designs on glass. The specialize guide design minimizes slippage, allowing for accurate entry into materials, making it essential tool for any project involving hard surfaces. Specifications: Component:Steel Diameter:Approx.3-12MM/0.118-0.47inch Hexagonal Shank Includes Size:6MM/ 8MM/10MM/12MM Package Includes: 4pcs/set Eccentric Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.