For use on Bosch alternators with free wheel pulleys.  This two piece tool is ideal for dismantling and assembling the free wheel pulley whilst changing the alternator or pulley. The pulley shaft is held in place with the M10 spline bit on 1/2"D socket whilst the nut is undone using the 33 teeth union nut with 19mm spanner. Suitable for use on most Audi, BMW, Ford, Skoda, Mercedes-Benz and Volkswagen.