You can tie this knot with a cocktail straw, or on a nail, or a swizzle stick. But for $7, this tool is a pretty good deal. I have three of them. One I keep stuffed at the bottom of a vest pocket, in case my leader breaks and I need to re-leader on the water. One is in the truck, where I organize for any given day. And the backup is on my desk at home. I have a thumb that's been broken a couple times and doesn't work quite right... but even in cold conditions when my fingers aren't so nimble, I can whip off a nail knot in seconds when I use this thing. Anyone else swear by it?