Features:1. Made of hardened heat-treated steel, it is very durable to use.2. They provide perfect cutting every time for high speed drills.3. High quality HSS drill bits provide reliable performance and durability when drilling on plastic, aluminum, copper, stainless steel and many other types of materials.4. Available in 8 different sizes, packed in aluminum box for safe storage and easy carrying.5. Suitable for carpenters, construction workers, electricians, workshops, DIY, home crafts, amateurs, stylists, etc.6. Install on the power tool chuck to prevent slippage.Specification:Condition: 100% Brand NewItem Type: Drill Bit SetMaterial: HSSColor: GoldQuantity: 8PCS/SetShank Diameter: 1/2 inchHandle Type: RoundSurface Treatment: Polished and Ti CoatedDrill Length: about 150mm / 6 inchesDrill Diameter: 14mm / 0.55in, 16mm / 0.63in, 18mm / 0.71in, 19mm / 0.75in, 21mm / 0.83in, 22mm / 0.87in, 24mm / 0.94in, 25mm / 0.98inWeight: 1788 g / 63.1 oz(approx.)Package List:8 * Drill BitsNote:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard..