Reddit reviews Kwikset Interior Door Emergency Key Pack of 5

Bend one so it fits on a keyring.

https://www.amazon.com/Kwikset-Interior-Door-Emergency-Pack/dp/B007F35V1I

Every one I've lived in. They're "privacy locks"; they're not for security, they're just to prevent someone from wandering in. They can be unlocked with either a straight pin
or a small tool that resembles a flat screwdriver
(and, in fact, you can use a small screwdriver to unlock those).

https://www.amazon.com/dp/B007F35V1I

$4.64. Keep them tucked in the top of the door frame. Seems easier and safer than reversing a door lock!

Looks like a key for an interior privacy knob lock. I think a Quickset brand lock set. Try it on one of bathroom doors.

edit: https://www.amazon.com/Kwikset-Interior-Door-Emergency-Pack/dp/B007F35V1I

edit: the trim carpenter would leave them on top of the door casing over the door with the lock.

My black and white cat opens doors too! We have a similar handle but it's lower down, he's a long cat so he actually stands up and pulls down on the handle with his paw. Its so bad we have to lock doors and bought interior door lock keys to keep him out of certain rooms, or to keep him from stealing the other cat's food.

It is a "key" for an interior door.

http://www.amazon.com/Kwikset-Emergency-Keys-Interior-Locksets/dp/B007F35V1I

Kwikset interior door emergency key

Kwikset Interior Door Emergency Key for interior doors [bedroom/bathroom)

Interior door key, the kind with a single round hole.

5 keys for 5 dollars - doesn't get cheaper

​

https://www.amazon.com/Kwikset-Interior-Door-Emergency-Pack/dp/B007F35V1I

What I called a church key was this:
http://amzn.com/B007F35V1I

"Church Key" is something else that would also be essential:
http://amzn.com/B00EWYGZA4

My last condo had the stupidest privacy handles. The sensible kinds are

• The coin/fingernail twist
  
• The paperclip push
  
  But there is a third kind -- one that relies on either having a very tiny and specifically sized screwdriver or the Proprietary key. For when you want your hollow interior door to be "locked" by a key that you don't carry on you but anyone could order online.

I would say a bed/bath door knob key for the door knobs with the simple turn lock on them with a hole on the opposite side, like these http://www.amazon.com/Kwikset-Emergency-Keys-Interior-Locksets/dp/B007F35V1I

Can't find one that looks like that one but it seems like it may work the same.

I put these types of keys on top of the door frames. Don't want someone locked in in trouble.

The keys I have look like this

We just bought a house where the previous owners had placed small keys on the top door frame outside every room with a lock. I think this is so they could easily get in a locked door in case there was an emergency or somebody slipped in the bathroom or something.

Yeah, and some interior locks have keys like these kwikset keys.

u/natarenec I believe this is what you are looking for

They're keys for the privacy locks on interior doors

Your salvation put them above the door frame or on a hook next to any door you want to lock and keep cats out of.