Spanomatic is offered by auto-mat engineers inc.It`s a 12 v dc wheel spanner. Just insert the plug into the cigarette lighter socket and press the start-up button. The clockwise operation tightens the nuts. Anti-clockwise operation loosens the nuts. The convenient, effortless and timesaving spanomatic comes with four sizes of sockets [17, 19, 21 and 23 mm] as a standard accessory. It weighs 1.7 kg and can be handled with ease by ladies and elderly people also.