The sinker with inner swivel for quick set up Made of brass, strong and hard, coated and smooth surface for saltwater resistance and long term usage Egg shape for quick and deep sinking, the inner swivel keep both the sinkers and baits centroid in line For #1 size 40pcs/pack total 1.6oz, max tension up to 39lb Easy to install, just connect the sinker with snaps or you can even tie fishing line in the swivel together directly