Description: Rotate Directions Function: Good for right hand and left hand nail artists. And also easy to operate when you need different rotate direction for nails. 5 in 1.Teeth at the top of Drill: the teeth for dead skin, cuticle. The size of coarseness is changes from the top to the end of the drill surface, from fine to coarse. you can remove nail polish / dip powder, and even the hardest acrylic nails and decorations.You don't need to change another size drill in the middle of working. Just choose a right size/ part of the drill to do it. Made of Tungsten steel, high hardness, long term life. Great cutting, each drills teeth is in good order. Fits most 3/32" Shank size nail drill machine. Perfect for use on acrylics or hard gels, excellent smoothing cutting performance for nail professional or home. Specification: Size: 7x1.3x1.3cm Matetial: tungsten steel Lines(optional) F: Fine Tooth M: Medium Tooth C: Coarse Tooth Package Includes: 1 PC Nail Drill Bit Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!