Look up Ratchet in
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A ratchet may refer to:

• Ratchet (device), a mechanical device for controlling rotational motion
• Socket wrench, a tool that makes use of the above mechanical device
• A part of some forceps, to fix the blades of the forceps, such as in surgical forceps
• Ratchet (instrument), a music instrument
• a slang term for a Folding Knife or Pocket knife; a favourite of the Rudeboys of 60s Jamaica
• a mechanism in corporate finance (also called Cliquet option)
• Quantum stirring, ratchets, and pumping, in physics
• Brownian ratchet, in physics
• Muller's ratchet, in genetics

Fictional

• Ratchet (Film and Video Production Company), a motion picture production company based out of Charlotte, NC. Ratchet Inc. Ratchet.tv
• the hounds of Annwn in the Cŵn Annwn in Brythonic mythology
• Ratchet (Ratchet & Clank), a fictional character from the Ratchet & Clank video game series
• Ratchet (Robots), a fictional character and the villain in the animation film Robots
• Ratchet (Transformers), a Transformers toy and fictional character
• Ratchet, a fictional character from the ecological cartoon series Widget the World Watcher
• Nurse Ratched, a fictional character from the novel and film One Flew Over the Cuckoo's Nest also Nurse Ratchet from an episode of the animated series Futurama
• Ratchet, a fictional town in the World of Warcraft MMORPG

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