Since I was asked in private I will share in public.
The key word is "hideout". A Bodyguard gave me a "bus token" that was akin to the coin knife. He also provided me with handcuff keys. Other little tidbits were the single edge razor blades/ itty bitty knife blades one could access if hands were tied in front or in back.
Here was the deal, some of us were those that had access to things thugs wanted. If kidnapped, handcuffed or tied, these items were to assist us in escaping/ evading.
This is not a new thing, this was some Strategy and Tactic that had been going on forever. Back when S&T were used and practiced in the true context - and not what some use and define the terms today.
I know for a fact when the Thugs came in and armed robbed a business, and they tied up the folks in the back room, one gentleman was the first to use his little hideouts to get his feet undone then he was able to reach a silent alarm. While he waited he was able to get his hands free and free others.
This fellow was a traveling sales rep. Unknown to the Thugs ( thank goodness his line was still in his car).
I know another lady that used a hidden handcuff key to free herself - again armed robbery. She too was able to contact Police using a hidden phone, with a non published line.
We laughed when the body chains came back, of course I had a lot of fun fitting these to ladies in skimpy tennis outfits, or in the back room and them in a bikini...
The style was body chains and folks wearing coke spoons, razor blades and all sorts of "culture" of the times.
Serious business was , forever those B.A Ballou Yellow Gold filled, Sterling Silver, and 14k yellow gold keychain knives had been worn on neck chains, by men and women, and body chains, by women for a long long time.
Men wore them as fobs in a vest, whether there was a pocket watch in that vest or not. Some of those "keys" in fobs were/ are handcuff keys...
Cuff links were also designed to house a little bitty cutting edge, blazer buttons as well...
My lady partner, used to get compliments on her "cute" key she wore on a gold anklet, and the Gold body chain...It wasnot the "key to my heart" - it was a real deal , real life survival tool(s). Just like the 18k yellow razor blade with a small diamond she wore around her neck, or the "Oh how cute, you have the key to his heart and your relationship will never dull with that cute gold knife".
Yes, she most times wore both on her body chain under he clothing, or on her anklet, or a braclet...
Just like we had holsters that carried NAA Mini Revolver in .22 lr.... Matters got to that point, we hoped we would allowed to tinkle, if you want to know where these were hidden in special holsters...
Bodyguards, ( now call Personal Protection) , Police, all sorts of folks did this.
Go look at Grandpa's Police issue duty shoes/ boots, his old duty belt, and other things he wore everyday.
You might find a couple of handcuff keys, small knives...or the imprint of them being there.
Survival knife? Might be that B A Ballou key chain knife. Survival toos- that hidden handcuff key...I know it has proven itself in real life.
Undercover had no gun, no Buck 110, no Old Timer pocket knife, his Beretta Jetfire found...
He got out...
This is what ticks some of us about all this "Security" stuff. Gubmint ain't gonna be there when you need them, and all this stuff does is give more to BGs looking for prey, and hinders the law abiding.
WE did not have 911, cell phones, cable TV or Video games. We had to think out of the box...
Just like folks have always done before us...
Many of us folks still do...