The HALFEN HBJ Betojuster is a adjustment device for aligning precast concrete wall elements. The HBJ Betojuster provides the building contractor with an easy and therefore a safe method for precise vertical adjustment of walls, whilst simultaneously avoiding injuries and preventing tool damage to the concrete elements. The adjustment process is done with standard tools requiring little effort. The optimized construction
height keeps the Betojuster in the subsequent floor construction area. It is not necessary to fill the screw slots.