Note: 1. Please allow a slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated the same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 4. Product interface for DC5521 model, suitable for most nail polishing machines on the market, please confirm that the interface is applicable before purchase. Specification: Condition: Brand New Item Type: Nail Drill Handle Material: Aluminum Alloy Speed: 35000 rpm Size: Approx. 14 x 2.3cm / 5.5 x 0.9in Inner Diameter of Interface: 2.1mm Output DC Voltage: 12V Features: 1、Good heat dissipation effect and can be used for a long time. High-quality accessories, with good texture. 2、The polishing handle is very quiet and smooth, with slight vibration, and the chuck handle can be locked/unlocked, safer operation, high efficiency. 3、Do not move the polishing head lock latch on the handpiece during operation; do not cover the vent on the handpiece during use. 4、The rotation speed is adjustable in 0?35000 rpm, supports forward/reverse direction, super fast; provides you with an efficient manicure experience. 5、Ergonomic handle design, comfortable to hold, easy to use, sturdy and durable. You can easily change nail drills without tools. Package List: 1 x Nail Drill Handpiece