Eccentric Twist Drill Bit Hexagonal Shank Highs Strength Eccentric Drill Bit Oblique Head Eccentric Drill Bit for Cement Granite. Features: 1. Heavy-Duty Eccentric Drill Bit: Built with outstanding hardness, toughness, and wear resistance, this eccentric twist drill bit delivers efficient performance on concrete, tile, glass, and composite materials. 2. Premium Tungsten Carbide Edge: Featuring a YG8 tungsten-cobalt carbide cutting edge, this high strength eccentric drill bit is engineered for metalworking tasks. 3. Fast and Accurate Drilling: Designed for power drills, this skewed head drill bit set offers precise positioning and low resistance to prevent slipping and wandering. 4. Hex Shank for Secure Grip: The high-hardness skew head eccentric drill bit's hexagonal shank design provides a firm hold and broad compatibility with most electric drills. 5. Versatile Multi-Material Application: This oblique head eccentric drill bit lets you easily tap threads on glass, tiles, wood, and more.