If you have any screw on filters, one day, one of them will get stuck on your lens. It’s a sad but true fact of filter use. Filters often get stuck because the pressure from your fingers bends the filter a little when you try to unscrew them. Gripping harder to un-stick a stuck-on filter just makes it worse. A filter wrench distributes the pressure of your grip around the entire edge, gripping the filter tight without bending it. Get a filter wrench before you need one so you’re not tempted to force off a stuck-on filter and make it permanently stuck in the process. A set of two wrenches costs about $5.
Thanks Nancylee and Jim... My new wrenches will come in handy! ;-)