Handcuffs

Handcuffs
Place of origin:	Earth
Made by:	Humans
Used by:	Harry Houdini, Klineman Halpen, River Song, Jo Grant
First appearance:	The Shadow of Weng-Chiang
Appearances:	PROSE: The Great Escapes, TV: Planet of the Ood, TV: Forest of the Dead

Handcuffs were a restraint device used by law enforcement.

Jesse James showed the Doctor how to slip out of handcuffs. (PROSE: The Shadow of Weng-Chiang)

Whilst travelling with the Eighth Doctor, Lucie Miller was taught how to escape from handcuffs by Harry Houdini. (PROSE: The Great Escapes)

River Song handcuffed the Tenth Doctor so he could not stop her sacrificing herself to save the people in the the Library's computer. (TV: Forest of the Dead) From how said "Spoilers", it's suggested they used them during sex.

Jo Grant handcuffed herself to Robert Mugabe during a political protest. (TV: Death of the Doctor)