Features:1. Alloy head material with stronger hardness, low resistance, high hardness, improving work efficiency.2. Triangular handle design makes the clamping more tight and does not slip.3. U-shaped spiral grooves is smooth and flat, and the drilling is smoother.4. Strong toughness and wear resistance, can be installed in the hand drill,electric drill,bench drill.5. Wide Application: Provides smooth and accurate drilling in ceramic tile, glass, brick wall, wood, etc.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement.Specification:Type: Multifunctional Drill Bit KitMaterial: alloyInclude:A: 10pcs: 6 mmB: 5pcs: 6mm, 6mm, 8mm, 10mm, 12mmC: 4pcs: 6mm, 8mm, 10mm, 12mmPackage List:Choice 1:10 x Drill BitsChoice 2:5 x Drill BitsChoice 3:4 x Drill Bits