Made especially for draw-filing and finishing metals. Taper slightly in width, thickness stays the same over the entire length. Both edges are square. Single cut on sides and edges. Mfg: Apex Tool Group SPECS: 6" (15.2cm), 19/32" (7.1mm) wide x 7/64X"X (2.8mm) thick. 8" (20.3cm), 25/32" (19.9mm) wide x 9/64" (3.6mm) thick. 10" (25.4cm), 31/32X"X (24.6mm) wide x 11/64" (4.4mm) thick.