I Will just add my two peneth, when you get them off throw them in the bin and just replace them with 4 normal wheel nuts, really not worth the bother as anyone who really wants them will have the kit to get them off in seconds, all the cars I have had have been pretty high end and I have took the lockers of all of them and never had any wheels stolen, mind you I dont live in Brixton for example. You will regret leaving them on when you have a puncture and cant undo them because they have stuck or been over tightened by an air gun and they round, just general advise avoid any lockers branded Mcgaurd or similar flower type pattern, I speak as a mechanic that has seen lots of issues with these.