Safer than others
it will stop working once you release the on-off button, which make you easier to control the nail drill pen working or stoping at anytime. just little pressure on the button will let it work.
this portable nail file pen is powered by 2 AA batteries. Compared with file machines which are connected to power directly, it is safer. Even when there is wrong use, there will not be big harm to the nails.
- Over-pressure protection Design
Smart over-pressure protection system make the nail drill stop working when over pressure on the nails to ensure safe and comfortable use without any hurt.