Subsequently, the frets would be made from fine segments of wood whose upper ridges would be reinforced
by small metal slides. These slides helped to prolong the resonance of the strings when the fingers playing
the vina pressed them on to the frets.
The latter are comparatively high and their base is carved in a convex curve that fits on to the cylindrical
surface of the tube. Traditionally, the resinous substance that binds them on to this surface is made from
a vegetable resin (ral) mixed with beeswax.