Applications: Ideal for drilling on iron, copper, aluminum, wood, steel plate, ceramic, brick, plastic, etc. Also suitable for glass, marble, full ceramic tile, granite, etc.U-type Slot Design: allows for fast penetration and evacuation of debris as you work.3.0mm Drills. The well-designed high-hardness carbide tip can easily penetrate various materials. Cemented carbide drill bit is used as a material to improve durability.