Keys
These keys are under the control or authority of Jesus. Like the keys in Revelation 1:18
Keys are used as a symbol of power, authority and ownership.
Background Reading:
Revelation 20:1-3
The Key
20And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain. 2 He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years. 3 He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations anymore until the thousand years were ended. After that, he must be set free for a short time.