5 Pcs Oxygen Sensor Switch Socket Wrench Kit and Thread Chaser Set<br> Perfect for removing, inspecting, replacing, and installing heated and nonheated oxygen sensors found on most vehicles.<br> Cut-out and slotted design enable sockets to be fitted over wiring harness, offset and compact allows for extra leverage in hard to reach spots.<br> Including 3 oxygen sensor sockets and 2 thread chasers for cleaning and repairing damaged threads.<br> Construction of chrome vanadium steel for extra strength and durability<br>