Premium Quality: Made of high-quality chrome-molybdenum steel, this cap allows the user to apply maximum force for precise installation and functionality. Design: The cap has a slot that allows you to remove the oxygen sensor while leaving the wiring harness connected. This 3/8" drive oxygen sensor socket is offset and compact, providing extra leverage, even in hard-to-reach places. Features: The 7/8" (22mm) socket fits most oxygen sensors and will work with any 3/8" ratchet or pry bar. The offset drive port with threads connects to the sensor from the side to prevent damage to the threads. Function: This oxygen sensor is very easy to use. The sensor is used in the toughest conditions and can require a bit of muscle to remove. This quality tool will save you time! Help you determine your vehicle's emissions and fuel economy. What you get: 1 offset oxygen sensor socket.