6Pcs 5-12mm 1/4 Hex Drill Bit Set for Glass Ceramic Tile Concrete Hole Opener Twist Drill Bit Set for Cutting Drilling Polishing Feature:High speed steel body, high quality alloy cutting head, durable. U-shaped flute, spiral chuck design, easy to remove cutout in the working process, more stable drilling. Non-slip 1/4 hexagonal handle, suitable for most machines. Specification:Material: hard alloy + high speed steelSize: 5mm/5mm/6mm/6mm/8mm/8mm/10mm/12mmQuantity: 8pcsPacking size: 137*44.6*23mm Used for drilling wood, plastic, ceramic tile, marble, glass, etc., not suitable for drilling thick metalNote:When drilling hard materials, please add water to cool downDue to different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement.6 x Drill Bit Set