Rules, recess profiles and H-profiles are simple but very effective tools with which large surfaces can be leveled. To ensure that these tools have a long life and continue to work accurately over the long term, they are manufactured from extruded aluminum profiles. The distinction between the different categories is made according to the field of application, which in turn determines the shape of the cross section of the profile. For fast and optimal work results, these products are offered in different lengths, as this provides the possibility of adapting the length of the tool to the work surface.