Trident Scuba Diving Magna Clip Stretch Coil Shock Lanyard with Wire Gate Clip and Split Ring Wide Plastic Clip to Split Ring with Magna Clip High strength stretch (to 36) coils provide connected security to dive accessories Magna Clip style uses two magnets to lock the coil lanyard together All you do is get the two parts close and the magnets do the rest CAUTION: MAGNA-CLIPS MAY CAUSE COMPASS DEVIATIONS IF PLACED TO CLOSE TO COMPASS. CHECK PLACEMENT PRIOR TO USE.