The cut off section allows the socket to pass through the wiring Practical: This oxygen sensor wrench is used for 1 / 2-inch drive ratchets or rods Professional or use : This oxygen sensor socket wrench is materials and is of application: This disassembly socket wrench is suitable for both heated and non heated oxygen sensors Function: This oxygen sensor wrench allows you to remove and install sensors on computer-controlled vehicles.Function: Including chrome-vanadium structure and six point-socket with cutting line, Manufacturer: Tsophreniq