This is a guide on how to make your own flip out key set using a bike multi tool set kit
Step 1: Take Off the Tools
Depending on how many keys you may have take off one side (or two) of the tools on the tool kit and check to see if the keys match up to the bolt that runs through it. If the keys don't line up you would have to find a circular file and round out the holes so the bolt can go through them.
Step 2: Line Up the Keys
Once you know that each key will fit on the bolt line the keys up in a way that you know they fit together and then using the washers from the tools that came off thread each key on and add a washer after.
Step 3: Tighten the Nuts and Bolts
Tighten the bolt up but make sure you don't over tighten because the keys wont be able to move around otherwise.
Step 4: Finished
Now enjoy having all your keys together in one holder.
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This is where I got mine from -
amicog made it!