How to get locking lugs off.

It is way easier to find a master "key" set and just take them off.
If they are set back in on an alloy wheel and the "Jerry Rig" technique fails you will regret it!
If these are steel wheels you are ok... just grind 2 sides flat and clamp the biggest *** Visegrip you can find on it ....
They are most likely McGaurds brand on a domestic car. The master sets are fairly common at tire stores and dealrships.