Similar to the handle of a tweezer that is squeezed between the thumb and finger

A) ring handle
B) thumb handle
C) ratchet
D) serrations
E) teeth

Squeezed

The action of applying pressure from all sides, often to extract liquid or alter its shape.

Thumb Handle

A handle designed to be grasped or operated with the thumb, typically found in various tools or implements.

Ratchet

A mechanical device consisting of a wheel or bar with teeth, allowing movement in one direction while preventing movement in the opposite direction, or colloquially, a situation or process that is perceived to be deteriorating or declining.