Pneumatic torque wrench.

Fullsize image: https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg



Previously:

Hydraulic torque wrench - GIF
Enormous torque wrench - photo
Tiny inch-grams torque wrench - photo
Hand-cranked torque multiplier lug nut wrench - GIF
Bolt with built-in tensile strain gauge - photo and patent
Torx key with torque indicator - photo