Features: Precise engineered HSS twist drill bit delivers 50% enhancing hardness, ensuring superior durability for drilling through toughly stainless steel and metal surfaces effortlessly. Sharpened cutting edges enable rapid chip removal, supporting speeds up to 1500RPM for smooth, high efficiency drilling in industrial grade applications. Ideal for professional technicians, metalworkers, and DIYer enthusiasts requiring reliable performances in heavy duty construction, automotive repair, or precise machining projects. Perfectly suited for centers, and electric drills in workshops, factories, or home garages to tackle stainless steel, alloy, and hardened materials up to 5mm thickness. The heat resistant plating minimizes friction and overheating during prolonged use, while the straight shank design ensures quick, tool less bit changes for uninterrupted workflow. Specifications: Component: High-speed steel Size: 1.3x15.1cm Attributes: 3/4/5/6/8/9/10/11/12/13mm Applicable scenarios: suitable for processing of cast iron, iron, and galvanized pipes Package Includes: 1pcs HSS Twist Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.