Sharpening stones kit
To sharpen your knives on sharpening stones, it is preferable to have a combination of several stones with different grains.
Depending on how sharp the knife is and how much you want it to become sharp, use two to five different grains.
The combination of medium-fine stones and fine-grained stones will be sufficient to achieve an excellent cut of your knives that have lost the cut for use.
If your knife is very blunt you can start with a 120 grit and go from several higher grits to a top grit of 8,000.
These stone kits are made to allow you to buy the right combination of sharpening stones