Doorkey Bottle Opener




DoomMeister LOVES beer and his teeth, that why I'm never without a bottle opener.

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

So if you share my morbid fear of being confronted by a beer you can't open (hasn't happened yet) 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.

Step 2: Measure Twice

Colour in the front face of your sacrificial key with either black marker pen (or whatever colour you have) or engineers blue.

For my opener I scribed around the profile of the one I had been using previously, essentially you want to mark a slot that looks something like the profile of a bottle top.

Step 3: Cut Loads of Times

If you are of a certain bent skip all of the below and reach straight for your Dremel, grind that SOAB right out with stone point. (If you do it this way, please wear safety glasses)

However for those of you who like to invest a little sweat into your projects, you can do what I did.

Secure your now marked up key in a vice or clamp (I used a toolmakers parallel clamp), and start cutting away with the edge of a file. I would suggest using something like a 8 inch or smaller medium pitch file.

Graduate to a fine file when you are close to the profile you marked out. Use a selection of needle files to finish off.

Just to reiterate what your apprentice master should have taught you, break all the sharp edges with 45 degree angles. This is going in your pocket after all.

Step 4: Its All in the Polish

To finish off polish your new bottle opener with progressively finer grades of wet and dry paper, for that near mirror finish you can use a soft stone and some brasso.

Now all that is left is to go away and drink some beer, having first used your fine new opener to get at that sweet brew.

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    22 Discussions


    7 years ago on Introduction

    its a wonderfull idea!
    but i think we are all forgetting old tools!
    why not use wire saw to cut the desired profile?
    i lernt to use wire saw by reading articles by w e burton in popular science/ mechanics!( any body heard about him?)
    its a nice tool and saves your energy too!
    thanks for good idea!


    Reply 11 years ago on Introduction

    Not sure about an angle grinder, seems a little bit brutal to be honest. The metal on this type of key is a fairly soft type of nickel steel, it cuts very freely by hand and takes a good polish. To elaborate on the Dremel comment I made in the Instructable you could use a small abrasive disc, I am thinking a 5" or 8" grinding wheel would be too much. Hmm unless you had access to a surface (or universal) grinder and were willing to dress a wheel to the exact profile, that would work.


    11 years ago on Introduction

    where can i buy a oldskool key like that lol ive never seen one


    11 years ago on Introduction

    Can these be made by my local keycutter? I have one by suckUK, and it looks like its been cast, which suggests not but I don't know the ins and outs of keycutting.

    1 reply

    Reply 11 years ago on Introduction

    If you wanted to pay, I'm sure a good key cutter could do this for you. However it really takes next to no mechanical aptitude to make one of these, get a key and file it down some. Jobs a goodun'

    As I kind of made clear (ish) at the beginning of the instructable the Suck UK was the inspiration for this project. I'm guessing that their product is either diecast or stamped (hard to tell from a photo), I just prefer to make my own stuff when I can.


    Go to a locksmith and ask if you cna buy/have a blank or two for that kind of key, usually it's free or they'll ask for a few pence or at the most a dollar or a pound for giving you the blank....


    Reply 11 years ago on Introduction

    Antiques, I had these as a result of a lock change. I know a lot of people who use these to lock their front door with, you might consider them state of the art round here.


    Nice project, I like it and have very well appointed blank key i was thinking of doing this with, granted i'm never without ciggarettes and a lgihter so i've got a bottle opener anyway... That and I've used kinves, forks, spoons, screwdrivers, walls, tables, empty, bottles, bits of pipe, a gun, an adjustable wrench, bits of wood, a coathanger and on one very special occasion a coconut... the coconut was later filled up with malibu though...

    3 replies

    I like the set the empty on the table and pick up the new technique, one swift movement of the wrist means the empty never leaves the table. granted it looks like chain drinking...

    Most of the above I have used as well, however to have a proper opener on your key chain is a real bonus. I use one most every week. I can only assume you used a gun as a lever rather than to shoot the end off your beer. Its a good job access to firearms is so limited round here I doubt I could shoot straight even when I'm not pissed up.