General description The Glass Tile Drill Bits set includes 10 pieces of multi-material drill bits designed for drilling through various hard and brittle materials such as glass, tiles, mirrors, wood, ceramics, marble, and brick walls. It comes with two small boxes for easy carrying and organization. Technical specifications Sizes included: 4 x 6mm, 2 x 8mm, 2 x 10mm, 2 x 12mm Material: Tungsten with carbide tip Design: Triangle drill bits with U-type housing Usage High precision for centering drilling Suitable for use with most general electric hand drills and bench drills Designed for quick dust removal without leaving smudges