General description Made of high-quality cemented carbide, this 10PC Efficient Universal Drilling Tool set features drill bits that are designed for durability and efficiency. The oxynitriding process enhances the hardness of the drill bits, ensuring they can withstand rigorous use. With a unique angle design, these bits offer low resistance during cutting, allowing for stable and fast drilling without breaking edges. Technical specifications Material: Cemented carbide Size: 8 x 6 x 0.3 inches Drill bit sizes included: 3mm, 4mm, 5mm (x2), 6mm (x2), 7mm, 8mm, 10mm, 12mm Measurement allowed error: +/- 1-3cm Compatibility and accessories Compatible with hand drills and bench drills Machine drill fixture range: 10mm and above Usage These professional glass and tile drill bits are ideal for smooth and accurate drilling in various materials, including ceramic tiles, marble, thin iron plates, mirrors, and glass. Other information Full-grinding and anti-rust treatment for clean and burr-free