22mm 7/8" Oxygen Sensor Socket, 1/2" Drive O2 Sensor Removal Tool | Universal, Offset Oxygen, Sensor Socket, Side Wire Cutout, Car O2 Sensor Removal & Installation, Maintenance Socket Spanner Size: 1/2" Oxygen Sensor Removal: Engineered with a 22mm (7/8 in) hex socket, this Oxygen Sensor Socket is well-suited for removing and installing oxygen sensors in cars, SUVs, light trucks, and diesel vehicles.