Description: Professional Oxygen Sensor Socket Set 7pc 3/8″ & 1/2″ Sq Drive Facilitates the removal, inspection or replacement of heated and non-heated Titania and Zirconia oxygen sensors found on most modern vehicles. Windows and slots enable sockets to be fitted over wiring harness. Package included: 1/2″ Drive x 29 x 90 mm 3/8″ Drive x 7/8″ x 90 mm Oxygen Sensor Socket 1/2″ Drive x 27 x 85mm Injector Socket 3/8″ Drive x 7/8″ x 80 mm Vacuum Switch Socket 3/8″ Drive x 1-1/16″ x 74 mm Oil Sender Unit Socket .