Water Gremlin's Snap-Loc® Dipsey Swivel is one of the world's most versatile easy-to-use sinkers. It works great for bottom or drift fishing. Snap-Loc's® patented eye easily snaps on and off your line. There's no twisting tying fuss or line damage. The Snap-Loc® eye is great for free-line fishing because it slides free on your line and goes right to the bottom. And that means the fish can take your bait without feeling the sinker weight. Snap-Loc® can also be snapped into the eye of a swivel to make twist-proof trolling rigs.