KeyThing - Key and Multi-Tool Holder

*Credit:*
This design is a remix of the [Proteus Key Holder (Regular Size)](https://www.thingiverse.com/thing:2749745) by ProteanMan. His keyholder is super awesome, functional and stylish.

*What's New?*
The point of this remix is to add a convenient holder for the little multi-tool I like to carry with my keys. It's a "Kershaw PT-2 Compact Keychain Pry Tool". I used to have this on a ring with all my keys, but it's not easy to use when it's attached to other stuff. So I wanted a way to carry it with my keys, but rapidly attach/detach for use.

*How does it work?*
The PT-2 has a 3 Hex wrench section. I've created an 'attachment tower' which will slide through the larger end of the hex hole and then can be pushed sideways into the smaller section of the hole. A ridge along the body of the key-holder locks the multi-tool in place keeping it secure. To remove, you push down on the pointy end of the PT-2 and slide off that ridge. Note that I've include 2 versions of the