Used for removing and installing oxygen sensor and vacuum switches. The specially designed 7/8 (22 mm) socket features a slot for wiring connector pigtail or vacuum nipples. It has 2-1/2 depth to fit over long sensors. It can be used with 1/2 drive ratchet or 7/8 end wrench on the external hex. Features: * Fits most Oxygen Sensors What"s In The Box: * Alltrade 648442 1/2-Inch Drive 7/8-Inch Oxygen Sensor Socket