Features:

• 1/2"Dr hole drive, 22mm (7/8") x 30mm Flare nut socket for vacuum switch & oxygen sensor service on computer controlled engines.
• Offset design socket allows access in tight areas.
• For oxygen sensors in exhaust manifolds of 1981 and later model cars and trucks.
• Applicable: MERCEDES, PORSCHE, BMW, VW, AUDI, VOLVO and MORE .

For oxygen sensors in exhaust manifolds of 1981 and later model cars and trucks 
1/2" drive, 22mm(7/8")