Patent ID: 8327739

Claim:
A wheel nut wrench made with a tube-shaped steel tube and provided with a nut socket portion at least one end, the wrench comprising: a nut socket shell portion having an inner periphery and an outer periphery, the inner and outer peripheries both being formed in a hexagonal shape and comprising corner portions, the nut socket shell being provided at an end portion of the steel tube; a sleeve comprising a bent steel plate having a hexagonal cross section, the sleeve comprising a plurality of corner portions and a plurality of flat plate portions, the sleeve also comprising a joint portion where opposite ends of the bent steel plate are close to or engaged with each other, the sleeve being pressed into the nut socket shell portion; wherein the sleeve further comprises one or more fixing holes provided at each of the corner portions; wherein the nut socket shell portion comprises a plurality of fixing protuberances protruding from the inner periphery, and wherein each fixing protuberance bulges into one of the fixing holes of the sleeve; and wherein the fixing protuberances secure the sleeve inside the nut socket shell portion by engagement with the fixing holes.