1. Oxygen Sensor Socket Wrench Including: 1pc 3/8' Dr. extra deep broach socket (31/8' long), 1pc 3/8' Dr. lowprofile crowfoot socket wrench (11/4' long), 1pc 1/2' Dr. offset crowfoot socket wrench (115/16' long), 1pc M18 x 1.5mm and 1pc M12 x 1.25mm thread chasers with 3/8' drive to clean and repair damaged threads 2. Oxygen Sensor Socket Wrench Set Special side cutout design allows easy access to oxygen sensors from any section and prevents damage to wires. Perfect tool set for removing, inspecting, replacing and installing heated and nonheated oxygen sensors and vacuum switches on most vehicles with computercontrolled engines. 3. 5 Pcs Oxygen Sensor Switch Socket Wrench Kit and Thread Chaser Set 3 types of universal socket wrenchs cover various situations of oxygen sensor location. 6point 7/8' (22mm) socket opening fits all hexagon oxygen sensor. Common 3/8' and 1/2' drive ends can be used with ratchet or breaker bar. 4. Oxygen Sensor Socket Wrench kit Including 3 oxygen sensor sockets and 2 thread chasers for cleaning and repairing damaged threads