Soft hold

When a child is 11 years old and is in their 24 hour loss of privileges but keeps hitting and kicking their siblings, would you use the soft hold? Could you explain more about how you do it, for what, etc.? How can you de-escalate the situation if two 11 year old siblings are both fighting each other and both are already in their 24 hour loss of privileges? Thanks. I'm looking forward to when your new practical self-government course is released.