10" Yellow Nylon Head Hammer With 1.75" Striking Surface The nylon head won't scratch or do damage to precious metals-no sparking Great for tapping bricks and boards into place- won't chip the bricks or scratch the wood This hammer is an excellent choice for the jeweler reshaping metal on a mandrel Use for gentle touch- This hammer is 10-1/2 inches long, and weighs 7.3 ounces The hammer head is 3-3/4 inches across, and has dual striking surfaces of 1-3/4 inch