After decades working with spin-on oil filters, this is the only filter wrench I have kept, while all others have been given away or relegated to the dust bin. At minimum size it fits in the palm of your hand for storage. And it will expand to fit any size spin-on oil filter from 2-1/2" to 3-7/8" diameter. Drive it with a 3/8-inch drive socket wrench, add a long extension for easy reach. It works first time, every time, never fails.

At time of this writing, under $5 at Walmart.