A set of tools for measuring the levels of leak-tightness in moving elements assembled in automobile bodies, the moving elements being doors and boot lids, said set characterised in that it comprises - a substantially prismatic measuring tool, comprising - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes - a plurality of magnets for fixing the measuring tool to the body, - and a sliding element traversing the measuring tool and is movable longitudinally through said measuring tool, comprising - an end and a safety stop, which contact respectively with the body and the edge of the moving element respectively, and - a mark between both ends providing the level measurement on - a graduated scale provided in the measuring tool, and - a substantially prismatic levelling stop acting as a stop between the edge of the body and the edge of the moving element, preventing the edge of the moving element from getting close to the body beyond a pre-established level, said levelling stop comprising - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes close to the measuring tool, and - a plurality of magnets for fixing the levelling stop to the body. - a substantially prismatic measuring tool, comprising - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes - a plurality of magnets for fixing the measuring tool to the body, - and a sliding element traversing the measuring tool and is movable longitudinally through said measuring tool, comprising - an end and a safety stop, which contact respectively with the body and the edge of the moving element respectively, and - a mark between both ends providing the level measurement on - a graduated scale provided in the measuring tool, and - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes - a plurality of magnets for fixing the measuring tool to the body, - and a sliding element traversing the measuring tool and is movable longitudinally through said measuring tool, comprising - an end and a safety stop, which contact respectively with the body and the edge of the moving element respectively, and - a mark between both ends providing the level measurement on - an end and a safety stop, which contact respectively with the body and the edge of the moving element respectively, and - a mark between both ends providing the level measurement on - a graduated scale provided in the measuring tool, and - a substantially prismatic levelling stop acting as a stop between the edge of the body and the edge of the moving element, preventing the edge of the moving element from getting close to the body beyond a pre-established level, said levelling stop comprising - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes close to the measuring tool, and - a plurality of magnets for fixing the levelling stop to the body. - a fixing housing in which there is inserted the flange of the edge of the body of the area in which the moving element closes close to the measuring tool, and - a plurality of magnets for fixing the levelling stop to the body.