Missing lug nut key
 

So, I got a flat on my 1995 993, put on the spare and moved on with my life. Until I got to the tire shop.
I LEFT THE KEY ON THE LUG!!!!
Of course, it was gone. I even retraced my steps hoping to find it. Tire guy said he could get them off. But he couldn't. Only on the spare.

So. I managed to successfully use a nut remover on the other rear wheel, broke the top off one of the fronts (teeth for the key are still there), and just stripped some aluminum off the top of the final one.

The pattern is three pairs of grooves, apparently equally spaced (think 2 Mercedes Benz symbols, slightly offset). I can't get a decent picture of the pattern.

Any ideas on how to remove the broken/stubborn lugs?
If anyone wants to donate their key for 2 minutes, that would be great too!

Just read your post and hopefully my answer is not too late. Not sure of the condition of the locking lug nut, but if it's not too damaged, the Porsche dealer has a master set of lug nut keys. I bought my 993 in TX, drove it to WI and when I went to replace tires, realized there was no key. Drove to my neighborhood Porsche dealer and he had a finely crafted wooden box that he brought out and it contained about 50 keys. He methodically, tried each one until he found one that fit. He then ordered me the key. I think it was about $15.

+1 on the Porsche dealership and their assistance with wheel lug keys. I developed a slow leak in the rear tire of my 996 C4S and when I went to fix it at a dealership in Albuquerque, NM., it was then that I realized I had the wrong key for my lug nuts. They quickly brought out the master set from Porsche, determined which # I needed and I ordered it right away.

lost keys
 

Funny I should happen on to this post I have lost me keys and was looking for a way to get the lug nuts off went to local lock shops and no deal just got done talking to local Porsche dealer and he says sure come on in we have the master bout 20 American for the key and now I will be back in service.
Nice to have ppl with the tricks of the trade. Must be Y I like to just browse the forums just to see what you might learn... Sure paid off once again ...... Thanks for posting .............