i don't think i can't explain it, maybe?

take your line
double it
pinch it into the pinch part.
One side of the pincher will now have a small loop of line sticking out and the other side will have 2 strands coming out (1 to rod and 1 to lure.
put both strands through the trip finger at the bottom. This allows the fish or the fisherman to trip it and still allows you to crank the crap out of your rods without them popping.

Adjust tension with the little plastic screw (before you pinch)

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