The device was designed to remove the glow plugs that are very tight due to corrosion or soot coal, respectively from the cylinder head. It creates a controlled angular-impact pulse (fine vibration) which provides that the glow plugs are loosened gently but with the necessary intensity. The counter clockwise torque can be adjusted in 4 steps according to breaking torque information. Plug dimension or manufacturer-Boring of torn glow plugs, which is usually connected with high salary or material costsIs largely avoided by using the vibro extractors e.g.: Common Rail diesel engines Newer kinds of glow plugs e.g. 8, 10, 12 mm Spark plugs, e.g. Ford and Alfa Romeo Twin Spark engines