One side smooth and other side with groove.

Recommended for use in all professional kitchens.
For sharpening different types of knives: for meat, fish, vegetables and fruit.
Efficient and precise single-step sharpening.
Abrasive material – aluminum oxide.
Contralateral wheels.
Simultaneously sharpen both sides of the blade at the right angle.
Blade sharpening time up to 15 cm: approx.
3 seconds.
Blade sharpening time up to 25 cm: approx.
5 seconds.