Matetial : Diamond Shank Diameter : 2.35mm (3/32inch) Usage : Nail Drill, Manicures, Nail polishing, Nail File, Nail Art Salon, Foot Care, Pedicure, Electric Manicure Drill, Teeth Whitening, Dental Laboratory, Callus Clean, Dentist Drill Package List :10pcs* Nail Drill Bit