A Snap Swivel with Click-N-Lock mechanism. You don't need to take off your glove to swap jighead, assist hook or lure. This tiny snap swivel has monster strength and won't break up to 230 lb (Yes, 230 lb rated for snap!). Compact size with all unnecessary parts removed. See how it compares to a quarter.

http://hitenausa.com/products/half-touch-snap-swivel.html