On the sad demise of my last keychain beer opener I was looking around for something cool to replace it with and came across this
Being of the opinion that the best stuff is hand made, and too cheap to buy one I decided to make my own.
Step 1: You Will Need
1 or more sacrificial keys (please don't use your actual doorkey, use somebody else's)
A set of files, I used an 8 inch bastard, a 6 inch fine half round and a selection of needle files.
A black marker or some engineers blue.
Some wet and dry paper, 240 through 1500 grit.
Optionally a Dremel for all of the above.