Using your Bosch GWX18V-50PCN angle grinder is easy. First, if you need to change the wheel, just use the X-LOCK quick - change mount. You'll hear a snap when it's properly attached, and you don't need any extra tools. To start the grinder, simply turn on the switch. Remember, the X - Brake will stop the wheel quickly when you turn it off. For safety, always use the vibration control auxiliary handle and the wheel guard that come with the grinder. If you drop the grinder accidentally, the drop control feature will shut it off. And if the wheel gets stuck, the KickBack Control will turn off the tool. As for maintenance, keep the grinder clean after each use. Wipe it down to remove any dust or debris. Also, check the X - LOCK mount regularly for any signs of wear. When not in use, store it in a dry place to prevent damage. You can connect it to the Bosch Toolbox app using the optional Connected Tool Module to track usage and get maintenance reminders.