The Alpen 3.0mm Tungsten Carbide Glass Drill is the perfect tool for drilling through delicate materials such as glass, bottles, porcelain, and ceramics. Its high-quality tungsten carbide construction ensures clean, precise holes without causing damage. Use in rotary-only mode for best results. Brand: Alpen Diameter: 3.0mm Material: Tungsten Carbide Range of Application: Glass, bottles, porcelain, ceramics Operation: Rotary only Features: Precision engineered, durable, suitable for delicate materials