1. Material: These screwdriver heads are crafted from quality K5 alloy with a hardness of up to 62 HRC, ensuring long lasting performance and reliability even under intense working conditions2. Magnetic: Equipped with excellent magnetism, these impact drill bits effortlessly pick up and securely hold screws without slipping or falling off, providing an effortless working experience and improving overall efficiency3. Nonslip: Featuring nonslip fine teeth and nonslip serrated blades for superior grip and stability, these bits effectively avoid cams from falling off and a precise and tight fit for screws, resulting in increased drilling efficiency and accuracy4. Versatility: Designed for versatility, these bits are compatible with a wide range of tools including impact drivers; electric screwdrivers; drills and more for a wide range of applications from home repairs to professional projects5. Product Size: The screwdriver bits are available in lengths of 1 inch/25 mm; 2 inch/50 mm; 2.6 inch/65 mm; 2.8 inch/70 mm; 3.5 inch/90 mm and 6 inch/150 mm. Different sizes can meet your different needs. And they are easy to carry or storeProduct Name:Impact Screwdriver Bit SetSize:1in/25mm, 2in/50mm, 2.6in/65mm, 2.8in/70mm, 3.5in/90mm, 6in/150mmShank:diameter 1/4in (6.35mm)Color:As ShownMaterial:Alloy SteelPackage Contents:10 * drill bits(2pcs of each Size in 25/50/65/70/90 mm)1 * 150 mm drill bitOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.