Mozart Trimming knife RWS172, now this trimming knife made by Mozart Germany is designed to cut away the excess weld on safety flooring. The floor layer pushes down and forward and the blade removes the weld rod while still hot, once cooled the weld shrinks and the spacer blade is pushed to the side and the weld is trimmed flat to the surface. This leave a perfect finish comes with full instructions. If you do safety flooring this is the tool for you. Recommended by Altro for their flooring and wall cladding products.