Orion Motor Tech 12pc Oxygen Sensor Socket Set, O2 Sensor Removal Tool and Thread Chaser Set with 22mm 27mm 29mm 7/8″ 1-1/16″ Sockets 1/2″ 3/8″ Drive, for Oil Pressure Vacuum Thermal Oxygen Sensors. Comprehensive Size Options: This Orion Motor Tech oxygen sensor socket set includes ten 1/2″ and 3/8″ drive sockets covering sizes 22mm, 27mm, 29mm, 7/8″, 1″, & 1-1/16″, along with two 3/8″ drive thread chasers to help you get the job done right.