Features Two-Part Splinted Wrench for Removal and Replacement of Free-Wheel Drive Pulleys Found on B 10-Millimeter by 12-Millimeter Point End for Locking the Alternator 33-Spline Cylinder on Shaft Inserts into Pulley Locking Bolt Use with 1/2-Inch Drive Tools Applications include VW, Audi, BMW, Mercedes, Opel, Porsche, Renault and Ford The two-part splinted wrench is required for removal and replacement of free-wheel drive pulleys found on Bosch Alternators 10mm x 12 point end locks alternator while 33-spline cylinder on shaft is inserted into pulley locking bolt Use with 1/2-Inch drive tools Applications include VW, Audi, BMW, Mercedes, Opel, Porsche, Renault and Ford