General description Wobble extension bars, also known as 'extender arms', are designed to provide access to hard-to-reach nuts, particularly in automotive applications. This Teng Tools extension bar features a 3/8in square drive and measures 250mm (10 in) in length. It is constructed from chrome vanadium steel, ensuring strength and durability, and has a satin finish for added protection. Technical specifications Length: 250mm (10 in) Drive Size: 3/8in Square Drive Material: Chrome vanadium steel Finish: Satin Manufacturer Part Number (MPN): M380022WC EAN: 5020385131309 Other information