String for slip bobber knot?

[tech29]

That is a similar knot to what I use, but a little different. Ever heard of a knot tying tool? They cost 4 or 6 bucks at.sportsmans or even in the exclusive wally world fly tying shop. This is what I use with 20 lb. backing wrapped 7-8 times. I believe they call it a nail knot when all said and done.
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