Enhance your drilling tasks with this premium Twist Drill Bit Kit, crafted from high-speed steel with cobalt for outstanding durability and performance. Designed to effortlessly cut through metal and other tough materials, these drill bits combine advanced heat resistance and toughness, making them an essential addition to any toolbox. Key Features: · Premium Cobalt High-Speed Steel: Manufactured from high-quality cobalt steel, these drill bits offer exceptional heat resistance and toughness, enabling smooth and efficient cutting through metals. · High-Temperature Quenching Process: Enhanced hardness and wear resistance are achieved through a meticulous high-temperature quenching technique, ensuring long-lasting durability and superior performance. · Double Back Angle Blade Design: The innovative double back angle blade opening improves sharpness and cutting speed, while optimizing chip evacuation for faster and cleaner drilling. · Superior Rust and Corrosion Resistance: Successfully passed the 24-hour salt spray test, these drill bits maintain excellent resistance to rust and corrosion, extending their service life even with frequent use. · High Concentricity Straight Shank: Featuring a precise and straight shank design, these bits ensure secure and stable attachment in a variety of drill chucks, preventing wobbling or loosening during heavy-duty operation. · Wide Compatibility: Compatible with multiple drilling tools including handheld drills, cordless drills, impact drills, bench drills, and magnetic drills, offering versatility for diverse drilling applications. · Comprehensive Size Range: This kit includes a broad selection of bit sizes from approximately 1mm (0.04in) up to 13mm (0.51in), providing the perfect fit for a variety of drilling needs. Specifications: · Item Type: Twist Drill Bit Kit · Material: High-Speed Steel with Cobalt · Hardness Rating: 8A · Wear Rating: Level 5 · Bit Sizes Included: Approx. 1mm (0.04in), 1.5mm (0.06in), 2mm (0.08in), 2.5mm (0.10in), 3mm (0.12in), 3.5mm (0.14in), 4mm (0.16in), 4.5mm (0.18in), 5mm (0.20in), 5.5mm (0.22in), 6mm (0.24in), 6.5mm (0.26in), 7mm (0.28in), 7.5mm (0.30in), 8mm (0.31in), 8.5mm (0.33in), 9mm (0.35in), 9.5mm (0.37in), 10mm (0.39in), 10.5mm (0.41in), 11mm (0.43in), 11.5mm (0.45in), 12mm (0.47in), 12.5mm (0.49in), 13mm (0.51in) This Twist Drill Bit Kit offers outstanding value with its combination of premium materials, precise design, and extensive size selection. Perfectly suited for metalworking, woodworking, and general drilling applications, it guarantees efficient, precise, and long-lasting performance for both professional and DIY projects.