A new slow slide that was not possible with conventional semi-long jigs due to the three effects of thickening both wings of Both-F and taking a long water receiving surface, shifting the input fulcrum with a modified front eye, and stabilizing by inertia and edge.The unusual front eye produces a stable slow slide even with a small jerk. Experience a different dimension of slow jigging.It is the turn of both-F-SL that can slow slide for a long time with this bottom as a range.