Locking wheel nut help?

[EthanMenace]

I’m trying to take my wheels off, Has anyone come across these before? The car didn’t come with a locking wheel nut key but It seems to fit a 5mm Allen key, I’ve given it a little tug but I’m cautious that it’ll round off.
Not really sure what’s going on here to be honest, sorry if it’s a stupid question I’m quite new to this.

 

[turkie172]

are you sure it is not a wheel stud fitted with a nut instead of the normal bolt the rest of the wheel has. The Allen key allows the stud to be fitted normally not the big a torque and held with locking compound.

Probably had spaces and they could not remove the stud after.

 

[EthanMenace]

Ah gotcha, that makes sense. I’ve never seen them before so I was really confused, just need to get my self a deep 17mm socket then.

 

[Frank Perry]

@turkie172 is literally a hero. Good spot!