Fetters of Trust

The Fetters of Trust is a technology that allows anyone with authorization to make a Homelander compelitely helpless and out of control of all systems sans the crucial ones, like higher brain functions.

Overview
The fetters are made of light and ductile metallic alloy that serves as a case to the molecular machines. When a wearer gives an explicit permission to put on the fetters, they disable all safety protocols from both brain and the CPU. Then an operator puts the fetters on a wearer, forming a collar and shackles out of metal strings.

In the past it paralyzed a wearer up to their neck, but nowadays they are able to move freely, albeit on moderate speeds.

An operator totally controls a wearer, and able to make the latter do anything the former wants, from using SSP to giving an order to kill themselves.

Until an operator removes the fetters, there is no other way to free a wearer. Only the operator who put the fetters on can remove them. The only known exception are the fundamental forces of reality.

Reasons to use
A common reason for the Homelanders to use the fetters is their desire to feel trust between them, even more than they usually do. Even if it's not as common as it used to be, the fetters remain a popular and reliable device to use during emotional times.

Exceptions
There is only one case when the fetters can be used without an explicit permission -- when they are used to prevent extreme damage to one's mind. But it requires an astonishing amout of cooperation and energy.

Every single Homelander should project all their energy towards the one who needs such help, effectively exposing it to the whole power of their star.

Since the beginning of their intelligence, this exception was used only twice.