Designed for seamless integration with a 1/4" bit driver, the adapters allow you to easily use micro bits for both manual and electric tools, for professionals and DIY enthusiasts alike Equipped with magnets, these 1/4 to 4mm hex micro bit socket shank converter securely hold micro bits in place, reducing the chances of bits slipping out, and enhancing overall work efficiency Made from high hardness alloy steel, these 1/4 inch to 4mm bit adapter are built to last. Their premium material ensures strength, durability, and resistance to wear, providing reliable performance over time This set includes 3 pieces of 6.35mm 1/4" to 4mm micro bit hex socket shank and 3 pieces of 1/4" to 4mm drill extension bit holders. The adapters are 25mm in length, and the extension holders are 45mm long, ensuring versatility for various applications These adapters facilitate a faster, more organized work process, making them for various tasks that require . Their design ensures you can work smarter, not harder, Weight: 0.09590108397 Pounds, Manufacturer: Frewurwer