Safety material - These clamps are made of stainless steel. After polishing. Strong and , no odor, not crack like plastic. Humanized design - The chip clip edge is round and round, and not scratch hands or scratches. These chip clips keep your family safe. Store your food better - Don't leave uneaten potato chips or wheat bread out to be contaminated and other . Keep your food fresh and safe to eat with our heavy duty chips and bag clips. Seal - Our clamp with strong spring, provide strong locking force, keep the bag seal tight, spring firm, not easy to leak. Protect your food from air or water and it keep your food fresh longer.