Cross four blade drill bit ceramic tile hexagonal handle brick wall cement ceramic perforated drill Feature Use high quality alloy as material. The bit oxynitriding process strengthens the hardness of the bit. 4 different sizes: 6/8/10/12mm The cutting resistance is small, the drilling is stable, the speed is fast, and the edge is not broken. The opening is neat, smooth, without broken edges, without tremor, and not easily broken. Fully polished and anti-rust treatment, clean and neat without burrs. The drill bit is more wear-resistant and more durable. Fully automatic polishing: polishing CNC is fully automatic, and each one is unified. Small size and light weight, very suitable for wood, plastic, walnut, amber, beads, beeswax, olive fruit, small model kits and many other DIY projects that require precise drilling. Quality assurance. We are full of confidence in our products and are always backed by trustworthy customer service. If you have any questions or questions about our products, please contact us. Specification Material: Steel Color: silver, black Size: 6/8/10/12mm The package includes 1pc: 1X drill bit 4pcs: 4X drill bit (6/8/10/12mm) 5pcs: 4X drill bit (6/6/8/10/12mm)