Dremel 2 Speed Rotary Tool. With its 2 speed control, you can easily adjust the speed from 15,000 to 35,000 RPM to suit your needs. The cool running ball bearing construction ensures smooth and quiet operation, while the replaceable motor brushes extend the tool's life for long-lasting performance. The lightweight design of the rotary tool provides comfort during prolonged use, making it ideal for tasks that require precision and control.