[Handpiece Replacement] The nail file replacement pen handle is easy to change without tools; it works on both natural and artificial nails [Forward and Reverse] The nail file replacement pen handle has two adjustable directions, allowing rotation forward and backward [Quiet and Smooth] The electric nail file operates at a high speed of 35,000 RPM with gentle vibration, providing extremely quiet and smooth performance [Durable] The nail file handpiece is made of premium metal, offering wear resistance and long-lasting durability [Wide Application] This nail file handle replacement is suitable for both DIY and professional salon use; it can be used as a replacement accessory for electric nail manicure machines Upgrade your nail care routine with this durable and versatile nail file handpiece. Enjoy smooth, quiet operation and easy direction changes for flawless results on natural or artificial nails