Control slugs and snails by deterring them rather than killing them by this effective copper adhesive tape simply surround the rims of pots or tubs with our copper barrier tape r should our slimy enemy try and cross the copper tape barrier it gives off a safe but unpleasant electric shock to them so they turn tail and run away it sounds odd but it worlks very well they simply refuse to cross itr lasts for years so it can be left on all year round