Strong, reliable key rings are needed in many areas of fishing. In non-predatory fish fishing, we can really benefit from them mainly in the preparation of boilies and other heavy ledgering final assemblies, and in predatory fish techniques, their potential for use is perhaps even greater. In lure fishing, they are indispensable for changing treble hooks, in the case of spinners, as well as in the case of the most expensive wobblers. If you install a new hook, don't forget to replace the old key ring that shows signs of material wear!