Answer:
With sharp edged wit and pointed poise. It can settle disputes without making a noise.
Used to keep prisoners silent and to make temporary repairs on cars.
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair
Take one royal word in the plural and make it singular by adding one letter
What is something you can hold without ever touching?
What bird can lift the heaviest weight?