Our S-hook clasps have two jump rings attached , one on each half of the "S." Use the jump rings to end each end of your design. Then open and close the S-hook accordingly to take off and put on your necklace or bracelet. There are many S-hook clasps to choose from, select one that suits the style of your finished piece. our S clasps are available in real gold plating, fine silver plating in with & without antique finish.