Compound lever

This is not usually the goal of a compound lever system, though in rare situations the geometry may suit a specific purpose.

A few examples of the compound lever are the scale, train brakes, and a common type of nail clippers.

Another example is the elbow-joint press, which is used in printing, molding or handloading bullets, minting coins and medals, and in hole punching.

A piano key is a compound lever of the first-class, since the fulcrum is between the weight to be moved and the power.

The quality of the resulting tone depends on whether the final speed is brought about by gradual or sudden movement of the key.

[2] The malleus, incus and stapes are small bones (ossicles) in the middle ear, connected as compound levers, that transfer sound waves from the eardrum to the oval window of the cochlea.

Nail clippers are a simple form of compound lever
Calculation of the mechanical advantage of a nail clipper
A handloading press uses a compound lever to reduce the force the operator must apply and confine the action to a relatively small space.
A compound lever translates the small movement of a piano key to the fast, hard strike of the hammer on the strings