• Permits easy removal of over running alternator pulley either on or off the vehicle.• Insert allows alternator shaft to be held while the pulley retainer is removed with the key nut.• Applications: Alfa Romeo, Audi, BMW, Citroen, Fiat, Mercedes, Mitsubishi, Renault, Seat, Skoda, Vauxhall/Opel, VW, Volvo.Permits easy removal of over running alternator pulley either on or off the vehicle. Insert allows alternator shaft to be held while the pulley retainer is removed with the key nut.• Easy removal of freewheel pulley from alternator either on or off the vehicle. • Allows alternator shaft to be held while the pulley retainer is removed. • Applications: Alfa Romeo, Audi, BMW, Citroen, Fiat, Mercedes, Mitsubishi, Renault, Seat, Skoda, Vauxhall/Opel, VW, Volvo. • Model No. SX401Technical Specification:Application(s): Alfa Romeo, Audi, BMW, Citroen, Fiat, Mercedes, Mitsubishi, Renault, Seat, Skoda, Vauxhall/Opel, Volvo, VWContents: Combined Socket Bits; 1/2"Sq Drive; TRX-Star* - T50-33T x 1