1/2''drive Extension bar,socket accessaries * Chrome Vanadium Steel * Chrome Plated * 3'',5'',10'' socket wrench 1/2'' Drive Extension Bar,socket wrenchSpecification: 1/2''Dr.- 3'', 4'', 5'', 8''.10'' Material: chrome vanadium steelsocket wrench surface:chrome platedextention bar with overall heat treatment 1/2'' Drive Extension Bar,socket wrench