The Pedra das Meigas offers a variety of stones and different grains, that allow the different necessary steps to a perfect sharpening, as such as thinning, sharpen and polish the blade. This process must always be performed using water, in order to maintain the tempera of the blade.
The first thing we have to know is the inclination angle. The lower is, softer becomes the blade, so, will cut better but will become most sensitive and delicate.
On the contrary, if the angle is larger, will cut less, but becomes more resistant.
The ideal is between 10 and 20 degrees. For example, we can say that 10º is the angle that we use to peel potatoes and 20º is the angle that we normally use to sharpen a pencil.