Made of stainless steel, heavy duty, sturdy and rustproof, these clips won't cause scratches even after long-term use and are stronger than plastic clips. The food sealing clips feature a strong spring and biting force for optimal sealing. Simple to use, no need to roll up the bag opening—just clip it, though rolling up the bag can enhance the sealing effect. Perfect for your potato chips, snacks, cereal, cookies, flour, sugar, frozen food, coffee, or anything else you need to keep fresh. With laser printing, you can showcase your brand name, logo, or any other message, making this product an excellent giveaway at tradeshows, fundraisers, and many promotional events!