It is a Ceramic Nail Art Tools/Multifunction Nail Drill Bit, Shank Diameter: 2.35mm, Head Diameter: 6mm, Head Length: 14.5mm, It has multiple functions such as nail removing, polishing, buffing and exfoliating scrub. It can be used on cuticle clean, gel remove, fit most nail art machine and is suitable for professional, salon or home use.