Class 1 Lever
From DT Online
This is the most common type of lever. With a Class 1 Lever the fulcrum is in the middle, like a see-saw. The effort is on one side and the load is on the other.
Features and Uses
|Parallel Jaw Pliers - two back pins slide in the slots and to get parallel clamping surfaces of the jaws:
(the red springs tend to move the jaws apart from each other).
Click top left to enlarge