A well made key, that is always available, but out of sight.
I have always carried a concealable handcuff key. I recently lost the one that I have had for many, many years and ordered this one. I also ordered new belt keepers. The new belt keepers will not fasten over the new concealable handcuff key. So, I will be ordering new keepers. I will not be without my concealable handcuff key. Its just to convenient and too much of a safety issue for me to not have it.