This is a nice clean vintage fish tail full sweep gouge chisel with special clearance on one side. It is marked "S. J. ADDIS CAST STEEL 11" cast into the steel, along with the Addis logo. It has been modified to cut a wide spiral pattern, no damage was done to the steel in the process, and the handle is special made oval instead of the normal round type, to help with the twist control of the tool. A good solid handle with a few dings on the end. A nice clean chisel with out-channel sharpening, ready to use.