As for anti-kink weights, since some spinners are too light for efficient casting, the lead added to prevent line-twist also contributes the extra weight needed.
The simple half moon lead folds over the leader and is squeezed firmly into position. The Jardine spiral weight twists on to the line—fine in principle, but prone to untwist at the most inopportune moments. The Hillman lead is a round bullet with a wire clip that fastens to the eye of the swivel above the trace attachment; highly efficient if it were not inclined to catch on every patch of weed, clog up and bring everything to a standstill. The boat-shaped Wye lead, with a wire loop for attaching to the line and a swivel mounted to its other end to take the trace, is also an efficient item but inclined to snag on the bottom or in weed. The answer is to use the anti-kink device best suited to the water—plastic vanes for weeded and shallow areas, leads for deep, clear water.
Whichever swivel you choosen and use, these small pieces of your tackle should be treated with care. Keep them separate from the rest of your equipment and do not allow them to rattle about loose, in case they become damaged. Some anglers keep their swivels in a small box or tin lined with felt and apply an occasional squirt of oil, which stops the steel items from rusting and keeps them spinning freely. Check swivels over regularly, and if they show the slightest sign of sticking, throw them away. A swivel that is not working properly may lose you the fish of a lifetime.