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 Kit Material: alloy Include: A: 10pcs: 6 mm B: 5pcs: 6mm, 6mm, 8mm, 10mm, 12mm C: 4pcs: 6mm, 8mm, 10mm, 12mm Package List: Choice 1: 10 x Drill Bits Choice 2: 5 x Drill Bits Choice 3: 4 x Drill Bits