We use tarred seine twine to complete our Sitka Adzes, D-Adzes, and Deluxe Kestrel Straight Knives. It may be useful for many other things as well. Strong indeed. Sold as a convenience for toolmakers who don't have access to a fisheries supply store. 1 lb spool, three sizes.
#9 Thin line for knives, 2050 feet per spool, $20.
#18 Elbow adzes, 1065 feet per spool, $18.
#21 Thickest, D-adze, 825 feet per spool, $18.
All the instructions you need are included in our Literature Package, see our literature page for more info.