Using your Bosch GWX27LM500 X-Lock Metal Grinding Wheels is a breeze. First, make sure your grinder has an X-Lock interface. To mount the wheel, simply place it on the grinder - you'll hear a snap, which means it's properly attached. There's no need for tools like a spanner wrench or flange nuts. When you're done and need to change the wheel, just pull the lever on the grinder. For best results, use these wheels with a small angle grinder. They're great for fast material removal in metal grinding or blending jobs. When using, always wear safety goggles and gloves. Keep the grinder in good condition by cleaning it regularly. After use, store the wheels in a dry place to prevent damage. Don't use the wheels if they're cracked or damaged, as this can be dangerous. If you have any questions, refer to the user manual or contact Bosch customer service.