PLIERS: The American Sign Language (ASL) sign for "pliers"
To do the sign for "pliers," show a "grip" and "slight twist" movement.  Repeat.
The movement is as if you have grabbed onto a knob or something and given it a quarter twist clockwise.
 

Sample sentence: Does the dentist sometimes use pliers?

Notes: 

Also see: DRILL

HAMMER

SCREWDRIVER

TOOL

WRENCH