These food clips are made of stainless steel with hairline polish finish, very sturdy without breaking, long lasting, unlike those plastic ones . We used a closure style like alligator teeth to reach an almost perfect closing, gripping very tightly on your food packages. Tons of unfinished food and snack need the clips to reseal such as your potato chips, cereal, cookies, coffee, trail mix, or anything else you need to keep fresh. No more stale chips or cookies and without having to waste a freezer bag. These clips also can be used to clip office paper, photos, or clothes. You can combine them with magnets, sticky pads,and other adhesive materials for even more great uses.