These are extremely handy to have. If you stack filters, or have a step-up ring on your lense, these are the best thing to use when you don't know your own strength.
I haven't found a thing to complain about. They are small, lightweight, and sturdy enough for the tightest seal.
So simple and easy to use. I wish I had these in my bag years ago! They work so well and are easy on your lenses and filters. Ever try to get a polarizing filter off your lens after hours of use? Frustrating as the face piece turns while you're trying to grip the threaded portion. With these filter wrenches, in a few seconds you're good to go!
A must have for your day bag!