Also called the Kreh loop after Lefty Kreh, the non-slip loop knot leaves a small, fixed loop at the lure or fly instead of snugging the line tight to the eye. That loop is the whole point: it lets the lure or fly pivot and move freely, giving it a livelier, more natural action.
When and why to use it
Use a loop knot whenever action matters more than a tight connection: on walk-the-dog topwater and hard plugs, on jigs you want to dart, and especially on flies. A Clouser or Deceiver on a loop swims with far more life than one snugged tight. A snug knot, by contrast, can deaden a lure’s action.
How it works
You tie a loose overhand knot in the line, pass the tag through the eye and back through the overhand, wrap the tag around the standing line a few times, then come back down through the overhand knot. Set the loop size small, then lubricate and cinch. The knot jams against itself so the loop stays fixed.
Tip Keep the loop small, just big enough to let the lure or fly swing. An oversized loop looks unnatural and can foul; a small, tidy loop gives you the action benefit without the drawbacks.