Are you lokking for a set of drill? This item is well made of for and practical use. With precise design and , it is perfect for drilling through numerous materials, including glass, mirrors, ceramics and other hard brittle materials like stucco. Feature - Color: black. - Material: alloy. - Size: 8.50X1.20X1.20cm/3.34X0.47X0.47in - Cutting diameter: 4/5/6/8/10/12 - Useful length : 43/43/45/48/55/55 - Blade’s length : 43/43/45/48/55/55(mm) - Overall length : 76/76/77/80/83/86 - Size : 6/8/10/12/14/16 - Deepest depth : 43/43/45/48/55/55 - Angle : 45 - Length of chip tank :43/43/45/48/55/55 - : 6.35(mm) - Well made of for and practical use. - Reinforced head that prevents bit cracking and provides a longer life. - Different style shaped drills can match your needs. - Sharpened edges for easy penetration in glass, mirrors, ceramics and other hard brittle materials like stucco. - Applicable to ordinary hand electric drill or bench drill. Package list: 6 x Ceramic Drill Bits