The Wera 05066861001 is a high-quality bit set designed specifically for Microstix® screws. With a hard design, these bits are built to last and can withstand heavy use without showing signs of wear and tear. Featuring a 4mm HIOS drive, the bits are designed to provide excellent grip and control, ensuring that you can work with precision and accuracy. Whether you're a professional tradesperson or a DIY enthusiast, the Wera 05066861001 bit set is an excellent choice for those looking for top-quality tools that are built to last.