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A vibroknife in use in space.

A vibroknife or autoknife was a knife-like type of cutting technology used in the 23rd century.


A vibroknife employed highly-focused ultrasonics. A power cell within it lasted for six hours. (FASA RPG module: Star Fleet Intelligence Manual)

It had a powered, vibrating blade that made cutting objects require very little exertion from the user of the device. (TOS novel: Planet of Judgment)

A vibro-blade was able to slice through most substances. A larger version, a vibro-sword, was employed by Gorn soldiers. (Heritage Models RPG module: Adventure Gaming in the Final Frontier)

A Starfleet-issue personal survival kit included a vibroknife. (FASA RPG module: Star Fleet Intelligence Manual)


In 2266, while wearing an environmental suit outside the USS Enterprise, James T. Kirk used an autoknife to slice through an unusual black membrane wrapped around the starship, revealing the Balant planet. Unfortunately the membrane quickly resealed. (TOS comic: "Skin Deep")

In 2269, McCoy was forced to perform a tracheotomy on security officer Alan Huff using a vibroknife covered with dirt and tree sap, after an electronic scalpel failed to activate. (TOS novel: Planet of Judgment)

The vibroknife concept has been used in other science fiction sources, such as the lore of Star Wars.