The Faithfull self-adjusting oil filter wrench designed to allow single handed operation for easy filter removal and which works up to three times faster than a conventional filter wrench. The wrench has a specially designed mechanism that allows it to quickly adjust to any filter shape and will tighten as the user turns the tool. The more pressure, the tighter the wrench will grip. A layered steel construction and serrated jaws provide both strength and durability and a tighter gripping force, which makes this wrench perfect for removing stubborn \'spin-on\' oil filters. This ergonomically designed wrench features non-slip shaped cushioned grip handles for user comfort. It is suitable for use on filters of 60mm to 120mm (2.1/4in to 4.3/4in) in diameter.