The NOx/Soot Sensor Thread Chaser Set M20x1.5 & M22x1.5, No. 9362, from CTA Tools features both the 9360 and 9361 thread chasers, offering a complete solution for cleaning threads in NOx/soot sensor holes in a variety of light and heavy duty diesel engines. Designed for use in both light and heavy duty diesel engines, the kit is suitable for cleaning threads in NOx/soot sensor holes, including those found in diesel particulate filters and various exhaust sensors. Both chasers feature a 1/2" hex head, providing convenient use with a hex ratchet wrench for easy clearance during the cleaning process.