pliers [3]
Hand tools with two movable jaws of fixed or variable gaps, intended for gripping or clamping objects.
locking pliers 
Used as pliers, wrench and vice, it has variable-gap jaws for gripping and clamping objects.
release lever 
Lever for unlocking the pliers and releasing the grip.
rivet 
Riveted assembly part that is the axle of articulation for the release lever.
toothed jaw 
Striated straight or curved part that, with its twin, grasps or clamps an object.
adjusting screw 
Screw regulating the jaws’ gap.
lever 
The pressure of the adjusting screw raises or lowers it, thereby controlling the jaws’ gap.
spring 
Tight when the handles are closed to lock the pliers, it resumes its shape when unlocked and the handles return to their initial position.