An common example of a lever is a see-saw. Some other levers are pliers, crowbars, wheelbarrows, scissors, staplers, fishing rods, tweezers, nut crackers and fishing rods.
There are three categories of levers. A first-class lever is when the fulcrum is between the load and the effort moving the load. A see-saw, pliers and scissors are all first-class levers. A second-class lever is when the load is between the fulcrum and the effort. Some examples of second-class levers include a stapler and a wheelbarrow. A third-class lever is when the effort is between the fulcrum and the load, such as a fishing rod and tweezers.