To prevent the engine shafts (e.g. camshafts, crankshaft) form turning or to keep them in a specific position when changing a timing belt or during other engine repairs.
Application for Alfa Romeo Twin Spark 1.4, 1.6, 1.8 and 2.0L 16V Twin Cam petrol engines (Engine code: 162.01, 332.01, 323.10, 335.03, 671.06, 672.04 and 76.01) e.g. Alfa Romeo 145, 146, 147, 155, 156, 166 Spider and GTV.
