The recommended tile drill bit specializing in opening holes in glass, it can enlarge existing holes with ease and can drill holes any arc of a circle. Cutting holes , no vibration phenomenon, easy to position, small resistance with higher operation speeds, easy to decorate and clean after drilling. Features - Color: Orange. - Material: Hard Alloy. - Size: 12.00X0.90X0.90cm/4.72X0.35X0.35inch. - Made of hard alloy, this glass drill bit has very good abrasion resistance and high hardness for longer life. - The recommended tile drill bit is used in opening holes in glass, it can enlarge existing holes with ease and can drill holes any arc of a circle. - Cutting holes , no vibration phenomenon, easy to position, small resistance with higher operation speeds, easy to decorate and clean after drilling. - cemented carbide with a reinforced head that prevents bit cracking and provides a longer life. - The triangular head drill bit is a tool used to take holes in ceramics and glass, stainless steel materials. Package list: 10 bits