I have many uses for metal clips as they are great to seal cereal bags and bags in my freezer. I really don't have any cons but I will be getting bigger ones real soon for paper projects that I'm working on
I am a Chicago Bird Collision monitor. We use these clips to secure a injured bird in a paper bag with identification label with details of capture. Can also be used for dead birds. They are secure and can be easily carried clipped to top parts of our carrying case/bag. We catch or pick up birds every day during the migration period and are an important part of our supplies. Thanks Staples!