Product Size This O2 sensor socket has a standard 6point shape and the socket size is 78 inch 22mm which fits most oxygen sensors. The square hole size is 12 inch 13mm, suitable for 12 drive ratchet or breaker bar Product Use The O2 sensor remover is suitable for most cars oxygen sensor, you can use it to disassemble, replace and clean the car oxygen sensor to help reduce your cars emissions and fuel consumption Cutout Design The O2 oxygen sensor removal tool is designed with a 0.7 18mm side wire gate which is extra wide enough to pass through the wire to prevent damage to wires, this design allows you to remove the oxygen sensor while still connecting the wire harness, which is both convenient and safe Product Material The oxygen sensor socket is made of highquality Chrome vanadium steel, and heat treatment to improve material performance and make it more durable Antislip Slotts The square hole of this socket has a unique slotted design. The four small slots have a good antislip effect, which can help to hold the ratchet firmly, making you more secure when using the oxygen sensor tool