The Supa Riddles help you in preparing the optimal groundbait mix. First of all, too coarse particals can easily be removed, in order to subsequently obtain an optimal moisture distribution in a mix. These riddles also come in handy when caring for live bait such as pinkies, maggots, casters and worms. The riddles fit on the regular 17ltr. buckets. The metal part is seamlessly incorporated into the plastic ring.