For vacuum switch & oxygen sensor service on computer controlled engines.                                      

For oxygen sensors in exhaust manifolds of 1981 and later model cars and trucks.

Applicable: MERCEDES, PORSCHE, BMW, VW, AUDI, VOLVO and MORE.

1/2" double square hole drive, 22mm (7/8") x 50mm high 6 pt Flare nut socket 

Offset design socket allows access in tight areas.