The blood knot is one of the simplest and most used knots in any type of fishing to connecttwo lines. It is a very strong knot, due to that the pressure is distributed along a larger area. This is a failsafe knot. This is how to tie the half blood knot in the simplest way. If you are using nylon or fluorocarbon, you should make min 5 turns around the line. Braided line in thinner and slicker, so is it recommended to make 10 turn, depending on the thickness of line, to ensure a failsafe knot.