The grinner knot is one of the most flexible knots used in angling for attaching line to an eyed hook, swivel or lure. It has a substantial wet knot strength of over 90 percent of the original line breaking strain. It is particularly effective when using worm baits at the trimmed tag end lies parallel to the trace or main line which helps prevent the bait from bursting. It is when using monofilament or braided lines although there is a school of thought that other knots work more efficiently when using fluorocarbon. Despite what many websites and paper publications say the grinner and Uni knots are not the same knot.