Overall Length: 50 mm (2 inch) Hex Shank Diameter: 6.35 mm (1/4 inch) This quickrelease bit holder is designed for secure fastening, fast bit changes, and wide compatibility with common power and hand tools. Engineered with a builtin stable lock and a efficiency spring mechanism, it ensures your screwdriver or drill bits are held firmly in place, reducing slippage and improving precision. Key Features: Rapid quickrelease system automatically ejects the bit, allowing faster installation or replacement and minimizing downtime. Hexagonal shank design fits standard power drill chucks, 1/4 inch impact drivers, and handheld drivers. Compatible with screwdriver bits, drill bits, batch heads, and similar tools for smooth conversion between tasks. Durable, compact build ideal for professional and DIY applications. Use Scenarios: 1. Quickly switch between different screwdriver bits when assembling furniture or cabinetry, saving time and effort. 2. Efficiently change drill bits during home renovation projects, ensuring a secure fit each time. 3. Adapt impact drivers for precision fastening in automotive repairs or equipment maintenance. This tool delivers dependable performance, enhances work efficiency, and offers broad compatibility, making it an essential accessory for anyone using drills or drivers regularly.