This version of the double-bladed stencil shears removes a strip of paper approximately 1/32" wide from the pattern, which is all the allowance that is needed when cutting stencils for copper foil work. These nifty inventions improve upon the old method, which was to tape two single-edge razor blades together and run it along the the pattern line, all the while trying not to cut yourself, nor destroy your tabletop. Ah, the conveniences of modern life! Stainless steel blades. Imported.