Shi brand Pro 9-Piece Easy Deep V-Shape French Cutter. 

Directions for use: 

Allow the white or pink powder to dry for about 15 seconds before applying to the nail bed.

Once the white or pink part is cut, use the deep V-shape French cutter.

Product features include:

* Arc design, easier-to-use

* Stainless Steel material that is moderately hard and durable 

Only for professional use.