Emergency Gas Shut-Off Wrench, 1-1/16 in. x 1/2 in. Opening, Stamped Steel, Zinc Plated Solid steel construction Quickly shut off gas in an emergency Fits most standard gas valves Both rectangular openings measure 1-1/16 inches wide, by 1/2" height. Comparing the opening sizes above to the actual size of the gate valve on the gas meter is recommended prior to purchasing to confirm correct tool size/selection