In assembly, the ferrule is driven forward on the tube by the nut during pre-set. As the ferrule moves forward it contacts the tapered seat area of the body, which causes the ferrule to cam inward into the tube. The leading edge of the ferrule is thus able to make a clean 360 degree cut into the outside diameter of the tubing. This cut in the tubing is often referred to as a “Bite”; thus the term: Bite Type Fitting. As the ferrule makes its bite, a small ridge of tube material is raised up in front of the ferrule.