Our premium ball bearing snap swivels are designed with a rounded business end to maximize lure action. The clevis is designed to slide up a diagonal and release. This design only allows the snap swivel to be opened by the angler. Size 5 - 280 lb Size 4 - 240 lb Size 3 - 180 lb Size 2 - 120 lb Size 1 - 95 lb Size 0 - 55 lb