Square Gravers are used by wood engravers and copper engravers. The face of the tool is square-shaped and will cut a line as deep as it is wide. This is a fine Square Graver (#1).Copper engravers use Square Gravers to create incisions on the surface of metal plates, which will hold ink during the printing process. The lines thus show up as black in the final print.
This tool was made from high carbon tool steel in the United States by E.C. Lyons. It is supplied factory-sharp, but it has not been honed to a fine edge.
Please note, engraving tools are known by different names in the U.K. and the United States. Square Gravers are known as 'Square Burins' in the U.S.A.