For beginners, this requires some time and practice. The slowest speed and the lightest pressure will be a good start. During the operation, do not touch any rotating parts. To avoid overheating, continuous use should not exceed 20 minutes each time. It is best to disinfect it with detergent after use. You can wipe the nail drill bit with medical alcohol. Do not open the nail drill by rotating it, otherwise the machine will be damaged. If you have any questions about the product, you can contact our customer service Package Included: 1 x portable electric nail drill 6x nail drill 50 x abrasive belt 1 x USB cable 1 x soft nail cleaning brush range: Rated speed: 20000RPMEasy to Use: Professional for home salon use, or travel, High efficiency and stable performance ensure the long working life of this nail drill. Low Heat Low Noise Low Vibration: This nail drill machine is built of a powerful yet quiet motor with smart heat dissipation, keep the machine in low heat, low noise, and low vibration while using it. Multifunctional Nail Drill Kit: this nail file can be used for all-around shaping, buffing, grinding, polishing, removing for acrylic nails, poly gel nails, thick nails, dip powder, fake nails, natural nails, and cuticle dead skin. Lightweight and Compact Design: It has a compact controller and light weight, which not only saves the space on your desk, but is also convenient to carry, suitable for multiple occasions. For for manicure, pedicure, polishing, shaping etc. It is ideal for both professional use in salon and beginner at home.