3 DIFFERENT Grits: 
 
80# to remove the gel overlays or shorten the acrylic or artificial nails easily. 
180# comes with a smooth surface and it will perfect on the natural nail and cuticle with your file's low speed. 
120# help you to prep the nail quickly, file the nail sidewalk, shape and smooth.
 
Great for Electric Nail Drills and other drills bits using sanding bands.
Widely used Perfect for all types of nail work such as sculpting, buffing, and polishing. Can be used for natural nails as well as artificial nails, great tools for any professional manicurist or beginner.
Nail Art 6 Drill File Bits Set: 6 pcs diamond nail drill bits with 3/32" shank size to fit most professional electric drills with 6pcs of sanding bands for nail filing.
Portable and Light It is easy to carry and portable to bring it out, You can so your nail artwork anytime anywhere. It is professional for both home and salon use.