Locking Nut

[Henjo_25]

(Hopefully this is the correct area to thread this)

Ive only owned my 172 for a month and will be getting a spanking new set of alloys this week. But I am not sure if I have found the locking nut or not all I have found is the little key that takes the centre caps off. Is this the locking nut or not? if its not im fooked cuz getting them fitted friday?

Thanks

 

[bmh.01]

No that isn't the locking nut key.