The Alpen 12.0mm Tungsten Carbide Glass Drill is ideal for larger, precise holes in delicate materials like glass, porcelain, and ceramics. Its durable tungsten carbide construction ensures clean and accurate drilling when used in rotary-only mode, reducing the risk of damage. Brand: Alpen Diameter: 12.0mm Material: Tungsten Carbide Range of Application: Glass, bottles, porcelain, ceramics Operation: Rotary only Features: Precision engineered, durable, suitable for delicate materials