Using your Bosch CWX27M450 wheels is a breeze. First, make sure your grinder has an X - LOCK interface. If it does, just snap on the wheel - you'll hear a click to confirm it's properly attached. No need for any tools. For a small angle grinder, these wheels are perfect for quickly removing material. When you're done, pull the lever on the grinder to release the wheel. Remember, always wear safety goggles and gloves when using these wheels. Keep the wheels away from moisture and extreme temperatures. If they start to show signs of excessive wear or damage, replace them right away. With proper use and care, these wheels will serve you well for a long time.