The six most common jumps can be divided into two groups: toe jumps (the toe loop, the flip, and the Lutz) and edge jumps (the Salchow, the loop, and the Axel). The Euler jump, which was known as a half loop before 2018, is an edge jump. Toe jumps tend to be higher than edge jumps because skaters press the toe pick of their skate into the ice on takeoff. Both feet are on the ice at the time of take-off, and the toe-pick in the ice at take-off acts as a pole vault. It is impossible to add a half-revolution to toe jumps.