Masonry Drill Bit Set 5 Pcs Set 6 6 8 10 12mm Multifunctional Carbide Tip Drill Bit Punching Drill Bits Set for Glass Tiles Concrete Wood and Plastic

The Punching drill bits are made of high quality alloy , which prevents drill cracking and improves durability. U-shaped groove design, Not curled, No gap, Quickly remove drill cuttings. Surface coating decign, Anti-rust, Smooth and sharp without burrs. Specification: Material: Cemented Carbide Color: Red + Silver Tool Holder Type: Triangle Handle Cooling Type: Outer Cold Blade Top Corner: 135° Category: Hole expansion drill Optional Style: 6mm(1/4"), 6mm(1/4"), 8mm(5/16"), 10mm(3/8"), 12mm(1/2") Weight: Approx. 130-180g / 0.29-0.4lb Blade Diameter: 6-12mm Package included: 2 x 6mm Drills 1 x 8mm Drills 1 x 10mm Drills 1 x 12mm Drills Note: Please be sure to add water to cool when using.