The Crescent 3" x 12" Flooring Chisel, part CFCH30. Supplier specification: CHISEL 3" X 12" FLOORING.
Match the chisel to the material. A wood chisel has a fine bevel for timber and will chip on anything harder; a cold chisel has a blunt, tough edge for metal and masonry. They are not interchangeable, and using the wrong one destroys the tool on the first strike.
