This tool reduces the force required to dispense solder paste manually. It is also more ergonomic and reduces fatigue. See picture for assembly. The parts "hebel" and "spange" have to be printed twice, one normal and one mirrored each. Requires some 3mm bolts, nuts and a short piece of threaded rod. A 4mm smooth rod is used for the joint, my version uses some old FischTechnik parts, but this is not really critical in the end. Happy soldering.