Edge jumps

Edge jumps use no toe assist, and include:
Salchows, which take off from either the left or right back inside edge. Allowing the edge to come round, the opposite leg helps launch the jump into the air and land on one foot;
Loops (also known as Rittberger jumps) take off from either the left or right back outside edge and land on the same edge;
Axels, which are the only rotating jump to take off from a forward edge. Because they take off from a forward edge, they include one half extra rotations and are very much considered[by whom?] the hardest jump of the six.