Yarn People

The Yarn People is according to Zapp Brannigan a strange looking alien species. Their appearance gave him the idea that the over-sized scissor Leela and her crew had bought to the opening of the new DOOP Headquarters were to assassinate them as part of a neutral plot.

It is possible that they are entirely made of string.

Quotes
Leela: But they're not even sharp. Who could I possibly hurt with them? Zapp: The Yarn People of Nylar 4?
 * Zapp: How do I know these scissors aren't part of some Neutral plot?