Quiet & SmoothThe polishing handle very quiet and smooth, with slight vibration, and the chuck handle can be locked/unlocked, safer operation, high efficency. Good heat dissipation effect and can be used for a long time. Highquality accessories, with good structure. ^Adjustable SpeedIts rotation can be up to 30000r/m to effectively treat both delicate areas and rough callus. Great for manicure and pedicure, ideal for shaping, polishing, removing callus, ect. ^Universal SizeMade of high quality material, pen design, durable and solid for longer use.Fits most nail drill machine, can be applied to 202 / 278 / 288 model nail machine.Ergonomic handle design, comfortable to hold, easy to use, sturdy and durable.You can easily replace nail drill bit without tools. ^Easy to OperateEasy to change drill bit,beginner can also choose it.Ergonomic gripping handle, comfortable to hold, good for operation.Professional nail drill machine handpiece, suitable for professional salon use or family use. ^Widely UsedIt usually use at manicure, pedicure, engraving, filing,shape, polish, remove callus,or pets nail beauty and so on. NOTE: Do not move the polishing head lock catch of the handpiece during operation; do not cover the vent on the handpiece during use.