This selector contains three sizes of Rubbercor® Sinkers and two sizes of Water Gremlin's Snap-Loc Dipsey Swivel. The SLD is one of the world's most versatile, easy-to-use sinkers. 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 just like a standard Dipsey Swivel sinker does but with the added benefit of being able to change sinkers without cutting and retying your line.