The Korda Cork Sticks are very handy sticks of cork that can be used to give your bait extra buoyancy. The sticks have a diameter of 4mm so they can be used with almost any bait. The cork is best used with baits that naturally sink such as boilies and nuts. It works best to use a small drill bit to hollow out the bait and then insert a piece of cork. The benefits of making your bait float is that it will stand out faster underwater and hooking is improved since there is less weight for the fish to suck in.