You can buy wheel lock removal sockets at some auto-supply outlets, they basicly are round sockets with internal splines that grip the outside round edges of the wheel lock. Just pound them on with a small sledge or ballpeen and use a 1/2 inch breaker bar or ratchet to spin em off, works like a charm everytime. I've personally removed about 20+ wheels this way in wrecking yards over the years where the keys are long gone. I've also found numerous wheels that were destroyed by jackasses trying to use vise-grips or chisels to get wheel locks off, the problem is the wheel locks are hardened steel and the rims are usually softer material, when the chisel or vise-grips, slip, and they will.....the rim, or yor hand will get the worst of it. The same could be true of trying to use a grinder to cut a slot in a wheel lock......one bounce-off or slip and you can wreck the actual rim pretty quick. Alternatively, sometimes an old 1/2 inch drive socket of a similar diameter can be knocked on and used with similar effect. :biggrin: