The unique curved Run Clip locks in position on the line under tension, but allows a slack line to freely pass through it. To adjust the depth your Zig Float is fishing feed line out from the reel to let the float rise or gently tighten the line to submerge the float and fish deeper. When a carp is hooked the Run Clip locks, for the first time allowing a lead to be ejected from a free running system for ultimate safety in weed or snags.