When removing and installing oxygen sensors, save yourself the headache of removing other parts just to reach it by using the ABN Oxygen Sensor Removal Tool Kit 1-Pack O2 Socket Removal Tool. It has (1) head with a 6-point socket and a 12-point socket recommended for downstream). 02 oxygen sensor socket tool also includes a curved handle to offer clearance around exhaust pipes or access to sensors positioned upward and inward from the floorboard. Oxygen sensor socket wrench is made of cold-forged steel, and no additional tools are needed to remove most oxygen sensors (depending on sensor location). This O2 sensor socket wrench will save you the headache of removing other parts such as a catalytic converter to remove lower O2 sensors. Penetrating oil and anti-seize optional, not included. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.