This is a new old stock chrome finish, 10" size adjustable wrench replacement jaw only. This one will fit the older adjustable 10" wrenches with the Diamond Calk & Horseshoe, Diamalloy brand thin jaw type wrenches. Diamond made a thin jaw model, and a more heavy duty thick jaw adjustable wrench, this it for the thin jaw type, as we tested it to be sure on the same. The jaw width at the very end tip is .36", and the diameter with the gear teeth is .34" diameter. Please check your wrench sizes according to these sizes before you order. This jaw is chrome plated, and is made to fit the chrome plated wrenches, but may fit others if the size and configuration is the same. We will be listing replacement parts for several sizes of adjustable wrenches, as well as other brands. Ask us if you have any questions. We have tested this jaw on a "DIAMALLOY STEEL" marked wrench with thin jaws, and it does fit it. Price is per each replacement jaw.