These paper clips perform as well as any other and they cost much less. This particular kind are smooth as listed. That means that they might slide around a little with thinner stacks of paper. Two advantages of smooth paper clips are: 1. They slide off without marking your document. 2. They can be bent into an S shape or straightened out when you need them for something other than a paper clip. The gripper clips cannot be bent without snapping apart.
I love these paper clips. I can not use the small ones I am older and have problems with arthritis. These large paper clips are easy to use they don't leave marks on the paper and the are sturdy.