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This is a great way to keep both slugs and snails off your potted plants without having to resort to using chemicals. It is a self adhesive copper tape that should be stuck to the sides of the pot to form a complete circle. As these annoying pests try to crawl past it, the tape creates a small electrical charge that is further intensified by the serrated edge. It is safe to use around pets and wildlife, and is environmentally friendly - but not so friendly towards the slugs and snails in your garden.