Keeper cabinet door tensioner made with steel, aluminum, and plastic parts, for good flexibility and strength. It has an anodized finish with the opaque or matte appearance. The thickness of the tensioning piece is 14 mm, in the middle and at the ends, they have the fasteners with an empty set of Ø 35 mm. The packaging brings all the pieces for use: at the ends a box where it will be fixed to the door, in the middle it has the mechanism that makes it tighten to one side or the other, by means of a lever, it brings some small pieces to attach the rest of the body to the door and lid.