The filter wrench is a special tool used to disassemble and assemble disposable oil filters for vehicles.
Generally, the common disposable filters are larger, with a diameter of more than 8CM, and the top of the filter is stamped into a multi-edge surface (like a large spiral) to disassemble and assemble the filter. And ordinary wrenches are not so big. So there is such a special tool: there is a handle on top of which is an adjustable size ring with teeth in the ring. When in use, it is put on the edge of the top of the filter, and when disassembling, the handle is pulled, and the movable wire buckle will be stuck on the edge according to the size, and it can be disassembled and assembled smoothly. And the size is universal, very convenient to use and carry.