Excellent Materials: The tile drill bit set for brick walls is made of alloy materials, strong and durable, which can be used for a long time. Unique Design: These tile glass drill bits feature triangular design and hexagonal shank, faster drilling speed that fits all power tools more easily and safely. Hot Tip: The carbide ceramic drill bits are suitable for most general drills, electric drills, hand drills and bench drills; NOTE: Please try to keep the drill bit vertical and use cooling water to keep it cool. Widely Used: The masonry drill bits are suitable for glass, ceramic, tile, mirror, plant pot, wood, porcelain, brick wall, plastic, copper, iron and marble. Package Included: You will receive 5 pieces of eccentric tile drill bits, all packed in a plastic storage box, very easy to carry and ranger, the size is 5mm, 6mm, 8mm, 10mm, 12mm. Carbide Drill Bits Specifications: Material: Alloy Steel. Size: 5mm, 6mm, 8mm, 10mm, 12mm Color: Black. Weight: 110g. Package: 5pcs Porcelain