The Superb Wrench Metal SW-5 fits several standard housings including:
The Metal Water Filter Housing Wrench - SW-5 fits a variety of standard water filter housings from American Plumber and Culligan, as well as many other under sink systems. This water filter wrench is constructed with a longer handle for better grip and leverage. The SW-5 filter wrench won't bend, bow or break due to its formidable zinc-plated, galvanized steel construction. This filter housing wrench is labeled with a directional arrow to make sure you turn it in the proper direction.
Metal Water Filter Housing Wrench - SW-5 specifications: