My pinking shears are at least 50 years old (Wiss brand to match my scissors). They worked well for years but then I wasn't sewing much and didn't use them at all. Now they are so stiff, I can't use them at all. I thought about taking them to a person that sharpens scissors but decided using the rotary blade version was easier and better for my hands. My grip strength isn't what it used to be 50 years ago.