DURABLE MATERIAL - Ultimate Screwdriver Bit Set made from chrome vanadium steel (CR-V) ensures long-lasting durability, perfect for impact driver and wrench accessories. COMPREHENSIVE COLLECTION - Comprehensive magnetic security bit set includes hex allen key, torx, nut driver, phillips, square, star and more; complemented by ratchet wrench and quick release extensions. EASY IDENTIFICATION - Drill bits are marked clearly for hassle-free identification, offering a spectrum of sizes: from small slotted tools to hex drivers, catering to all your screwdriver needs. TOOL COMPATIBILITY - Comes with 1/4 magnetic extension, making it seamlessly compatible with electric screwdrivers, manual ones, hand drills, pneumatic tools and tools with other holders. ORGANIZED STORAGE - Securely packed in a robust case with labeled slots, ensuring organized storage and effortless transportation, featuring double drivers, cross tip, and clutch drive in one kit. Discover the pinnacle of craftsmanship with our Ultimate Screwdriver Bit Set. Made from resilient chrome vanadium steel (CR-V), this comprehensive collection includes hex, torx, magnetic screw heads, allen, nut, security, phillips, and more. Paired with a versatile ratchet wrench, quick-release extensions, and clear markings for easy identification, it's the ideal choice for both electric and manual screwdrivers, as well as hand drills and pneumatic tools. Neatly organized in a robust, labeled case, this set offers unmatched durability and precision, making it an essential addition to every toolkit.