Tired of being limited by different thread sizes on your power tools? This HARFINGTON adapter solves that problem perfectly! It converts M10 female threads to M14 male threads, letting you use a wider range of accessories with your existing tools. Made from durable 45# steel, this thing is built to handle serious use without deforming or breaking. The precision threading ensures a tight, secure fit that minimizes vibration and wobble during operation. Installation is straightforward - just screw it in and you're ready to go. It works with angle grinders, rotary tools, concrete polishers, and lets you connect diamond core bits, polishing pads, cup wheels, and various other accessories that might not otherwise fit your tool. Whether you're working with metal, wood, or doing auto repairs, this little adapter opens up so many possibilities. The 20mm total length and 15mm external thread length are perfectly sized for most applications. Just double-check your tool's specifications before buying to make sure this is the right adapter for your needs!