CLASSES OF LEVERS.

We can divide levers into 3 classes according to the locations of the fulcrum, force and resistance.
CLASS 1: The fulcrum is between the force and the resistance and the effect of the force applied is increased or decreased. 

CLASS 2:  The resistance is between the fulcrum and the force and the effect of the force applied is always increased.

CLASS 3: The force is between the fulcrum and the resistance and the effect of the force applied is always decreased.

Other examples are: a brake levers, a hand crank and the bicycle handlebars.