The Hapstone Hex screwdriver with ball end is an essential tool for any Hapstone sharpening system user. This screwdriver is specifically designed for use with the Hapstone R2 Lite - Small clamps, allowing the user to quickly and easily tighten the clamps and secure their knife or tool in place while sharpening. The 4mm screwdriver is made of high-quality materials, ensuring that it will last through many sharpening sessions and provide a reliable and precise tightening experience every time. With its ball end, the Hapstone Hex screwdriver makes it easy to access hard-to-reach screws, helping to ensure that clamps are tightened evenly and securely. Whether you are a professional knife maker or just looking to maintain the sharpness of your kitchen knives, the Hapstone Hex screwdriver with ball end is an indispensable tool for your sharpening system. The 4mm Screwdriver fits the Hapstone Modular Platform Hapstone R2 - Full sized clamps Hapstone R1 - Most components Hapstone M2 - Three point guide Hapstone V7 - Three point guide Hapstone K1 - Most components