Recommend carrying the Case (2x)
I had a situation where 1 suspect had a badly
healed should which prohibited the use of just one pair. I had TWO suspects that time.
These definitely work, and they don't become a liability.
You'll also need the cutter, Do NOT use a knife !
On A Lighter Note :
When dealing with persons who aren't normally fearful of authority, normal handcuffs don't get the work done. Those with experience of public detention WILL recognize these.