There are hundreds of knots out there and each experienced fly fisherman seems to have his or her own opinion on which is best. In our opinion, there are only 3 or 4 knots you’ll need to master.
Below, you will see a diagram outlining the Standard Fly Line System. The Arbor Knot attaches your backing to the reel, the Nail Knot is used to attach your backing to the fly line. The Loop-to-Loop Connection (Handshake Knot) is used to attach your fly line to a tapered leader. If your leader and/or fly line does not have a loop, you can use the Nail Knot again. The Surgeon’s Knot is used to attach tippet to your leader. Your tippet is attached to your flies via the Clinch Knot.