Small Crystal Top Barrel Shaped Mandrel Bit: MelodySusie 3.1mm mandrel bit are designed with a premium metal material, which is stable and easy to insert into the bit and maintain stability. | Superior Quality and Saving Your Money: High hardness, anti-slip design, heat dissipation and easy to clean. Inner tension spring design, easy to take off the sanding bands. Suitable for nail salons, beauty parlors, spas or personal manicure pedicures, and DIY nail art at home. | Multifunctional: The mandrel bit is designed to be suitable for most size 3/32" nail drill machines, which is used for grinding, smoothening, shaping, shortening, and polishing for all nail arts as well as cuticle removal. | Easy to Operate: Select a sanding band in place over the mandrel bit and gently apply pressure to the surface of the bed. It is suitable for manicures as well as pedicures. Working on natural nails as well as artificial nails. | Portable and Light: It is easy to carry and portable to bring it out. You can use it for your nail artwork anytime anywhere. It is professional for both home and salon use. Please note that to prevent breaking, the mandrel drill bits cannot be dropped.