focus locking wheel nuts

[woodypup59]

The newish type with the wiggly groove cut in the end face as below.

Does anyone know how many "combinations" there are ?

I've seen them on Ebay advertised with a colour name (eg blue) or a number ( eg 1, 2 or 3).

I've lost mine and one on Ebay looks very similar but the seller doesn't know its part no.

[liquidfox]

7 as far as I know, email McGard a picture of the wheel nut and they'll send over a new key.