Abstract: A fishing rig for use in catching fish includes a fly or a lure attached to a hook having an eye, a quadratic surface having first and second ports disposed centrally on the quadratic surface and extending through the surface, and a leader of filament passing first through the first port of the quadratic surface, through the eye of the fly or lure, then through the second port forming a loop upon which the quadratic surface is free to slide to and away from the eye.