1)  2.35mm (3/32 inch) shank diameter, our drill bit fit for most electric manicure machines on the market.

2)  Check nail bits before use, if it's broken, do not use.

3)  Always wear eye-protective safety glasses, avoiding the chippings to hurt your eyes.

4)  For professional use only.

5)  If the bits drop down, please check whether it's broken or not. if it's broken, for safety, do not use

6)  Keep out of reach of children.

7)  Disinfect nail bits after use.