First of all
It is rotation speed RPM – revolutions per minute.
Nail tech should not go for less than 30,000 RPM, the higher the better. For home use, it should be not less than 20,000 RPM. Then are bit heads.
Because of a variety of available sizes and shapes, it’s difficult for someone who is new to this. Industries standard is 3/32 inches in diameter. Keep eye on it when purchase nail drill and nail drill bits.
Lightweight
is important as well if it’s too heavy you won’t be able to work fast. Hands and wrists will hurt after a long working day. Next is the level of noise, vibration, and heat, this will not only affect feelings of use but also the accuracy of your work. Forward, reverse mode – it allows you to work in different directions without twisted positions.
When I look for a nail drill, I followed all criteria and made my choice. Have been using my drill for a while, and I love it. Here you can see my choice.
Couple of others
Bonus
It’s not necessary to use a nail drill on natural nails because you need only remove oil, and oil does not penetrate so far that you need a drill to remove it. You can remove natural oils by rubbing lemon juice over your nails and after 10 minutes washing off. Using a drill on a natural nail can cause pain.
Take care of your nails.