Light-weight design for precise operation! Quiet and smooth Easy and simple to operate! Suitable for pedicure and manicure The nail file can be used for natural nails as well as artificial nails For professional studio use or home use Use 2 x AA Batteries (AA Battery is NOT included in this auction) Size: 18cm (L) x 3cm (Diameter of handpiece) Package include: Drilling Handpiece Machine 5 Optional Bits Diamond Cone - Remove dead skin & callus Small Grinding Cone - For cuticle & corners Felt Cone - To polish buff Grinding Cone - Smoothes thick nails & rippled surfaces Emert Head - To shape, sculpt & trim.