For non-ferrous metals. Each one is double-sided, with a different design on each side. Simply lay your sheet metal over an anvil or other bench block and strike it sharply. With a checkerboard surface on one face of the hammer head and wide stripes on the other, this texturing hammer gives metals a texture. For create new patterns, simple rotate the hammer head with each strike. Overall length is 10" with faces diameters of 1-1/8”.