Multi-function Nail Drill: 5 in 1, professional for nail artists.2 Rotate Direction: It's suitable for right handed nail artists, and also for left handed. And meantime, 2 directions for choose in different situation.Teeth on the top of drill: could be used for clean dead skin or cuticle.Different sizes of coarseness on the surface of drill: From top to the base of drill, the coarseness changes from fine ,to middle, to coarse. You don't need to change another drill for different size during working.Made of Tungsten Steel, high hardness, long term life. Shank: 3/32" (2.35 mm). Coarseness for choose: Coarse, Middle, and Fine.