they're called zipties   (quote)

""It was like a swarm of ants," said Reese. The soldiers just couldn't keep up. They began zip-stripping people (putting them in plastic zip-strip handcuffs) and throwing them in the "asshole pit," a little open-air barbed-wire enclosure they had built. Let the sleet and snow torture them a little."
  -Dana Priest, in The Mission, quoting a soldier's recollections about trying to stop Albanians from torching Serb's houses and possessions after the 1999 air war that destabilized Serbian control of the region.