A blade being balanced by knifepoint.
knifepoint definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The sharp end of a knife.
knifepoint - Phrases/Idioms
Under threat of being stabbed or cut with a knife: was mugged at knifepoint.