The Tie-Fast Knot Tyer is a very handy knot tying tool that helps with tying several different knots.
The Nail knot can be used for attaching the backing to the fly line and the fly line to the leader.
A smooth low profile knot that will readily pass through the fly rod guides.@AnglingKnots
Check out the easy to follow step-by-step knot illustrations in the publications:
Fishing Knots – From the reel to the hook:
Fishing Knots & Rigs:
The Fishing Knots Posters:
https://fish-and-bits.myspreadshop.co.uk/all
or
https://fineartamerica.com/featured/1-fishing-knots-andy-steer.html
Disclaimer:
No responsibility in any way is accepted for incidents arising from the use of this material.