Ratchet

Ratchet may refer to:

• Ratchet (device), a mechanical device that allows movement in only one direction
• Ratchet, a tool also known as a socket wrench
• Ratchet (instrument), a music instrument

In film and television:

• Ratchet (Transformers), a character in the franchise Transformers
• Ratchet (Robots), a character in the film Robots
• Ratchet, a character in the Widget the World Watcher television series
• Ratchet, a character in the Red Lantern Corps DC Comics series

In games:

• Ratchet (Ratchet & Clank), a game character
• Ratchet, a town in World of Warcraft

In other:

• Ratchet, a financial derivative also known as cliquet option

See also

• Quantum stirring, ratchets, and pumping, in physics
• Brownian ratchet, in physics
• Muller's ratchet, in genetics
• Ratchet effect, irreversible, or difficult to reverse, processes in economics
• Nurse Ratched, a fictional character from One Flew Over the Cuckoo's Nest
• Nurse Ratchet, a fictional character from the animated series Futurama