This is a new old stock plain steel finish, 8" size adjustable wrench replacement jaw. This one will fit the older Crescent brand 8" wrenches that are marked Jamestown on them, and perhaps newer ones too. The thickness of the jaw is .34" at the narrowest tip of the jaw, and the gear area diameter is .30". Keep in mind that the chrome plated wrenches were narrower, and had different gears, and threaded wheel. We will be listing replacement parts for several sizes of Crescent wrenches, as well as other brands. Ask us if you have any questions.