Powerbuilt 648442 Oxygen Sensor Sockets For removing and installing oxygen sensor and vacuum switches Specially designed 7/8-in. (22mm) socket features slot for wiring connector pigtail or vacuum nipples 2-1/2-in. depth to fit over long sensors. Can be used with 1/2-in. Dr. ratchet or 7/8-in. wrench on the external hex Removes and installs oxygen sensor and vacuum switches Specially designed socket features slot for wiring connector pigtail or vacuum nipples 2-1/2 inch depth to fit over long sensors Can be used with 1/2 inch drive ratchet or 7/8 inch end wrench on external hex Chrome vanadium steel for strength