Gingher pinking shears are my favorite. I've had to use the Fiskar pinking shears, and they wouldn't cut for me. We occasionally get pinking shears in the shop to be sharpened. Sometimes it isn't a matter of not being sharp, it's a mater of how smoothly / un-smoothly they close. Sometimes it helps to oil the center screw. Our scissor sharpening guy says you can only sharpen pinking shears maybe 3 times before they can't be sharpened any more and still function. They kinda have to "live in a perfect world," to function properly.