Answer:
I am owned by every man though my length differs. Their wives uses me after getting married.
I cannot be other than what I am, until the man who made me dies. Power and glory will fall to me, only when he last closes his eyes.
Tear me off and scratch my head, what once was red is black instead. What am I?
I am not alive but I can die. What am I?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. What am I?
It is an insect, and the first part of its name is the name of another insect. What is it?