The invention relates to a spanner for nuts and bolts, of various sizes, which has no moving parts. The spanner consists of a body (1), solid or with openings (5), to reduce weight. At the ends of the body (1) there are holes (2), polygonal in shape, where each one partially overlaps the one next to it. Holes (2), of different sizes, can also be present on each side (3) of the body (1), which are perpendicular to the inclined surface of each side (3) of the spanner.