A simple fact with clip down rigs where the snood line is usually a lower breaking strain than the rig body is that the snood stretches considerably more during the cast! In consequence, after a few casts the snood will be too long to clip down and the rig will no longer function. To prevent this, the Genie SRT Spring compresses during the cast, reducing the stretch in the line and so helping to maintain the snoods original length, cast after cast. The SRT Spring also keeps the hook under optimum tension in the bait clip during the cast and gives dynamic release! Each pack contains 10 SRT Spring set-ups (SRT Springs, Beads and Crimps). 10 Per Pack.