General description Extension bars, sometimes called 'extender arms', allow access to nuts that are difficult to reach, typically in automotive applications. This Teng Tools extension bar features a 3/4in Square Drive and is designed for strength and durability. Technical specifications Size: 400mm (16in) Material: Chrome Vanadium Steel Finish: Satin MPN: M340022-6 EAN: 5020385138865 Other information