This film shows how to tie the Pitzen knot; a good knot for tying flies on to a leader or tippet. Easy to see, and with clear directions and some top tips, this is one of the best knot films out there. In addition, this film finishes with a laboratory test that breaks the knot under a controlled environment - illustrating the relative knot strength. The knot tested in this film was tied in a piece of 10lb RIO Steelhead/Salmon tippet material.