[billstokes]

OP - you don't need a dedicated wrench to remove your stuck filter. Use a hammer and long, flat blade screwdriver. Put the tip on the top (the rolled edge, which capture the threaded silver face plate) of the filter. (Punching a hole through a filter is always a bad idea.) Angle the screwdriver so that when you tap it with the hammer it will push the filter in the direction you want it to turn. A couple of taps should loosen in enough to spin it by hand. yes, you[;l have to lie on the floor to do this, but it only takes a minute.