Does anyone know which locking wheel nut key I need?

[RBZ35]

Hey there! I've got a slowly deflating tyre that I'm wanting to get looked at but my wheel locking nut key has seemingly disappeared. Does anyone know of a replacement? 

I've had a good look and I've got a 6-prong star pattern. I believe this is an M12 x 1.25 with a 60° seat. I've found a set on Halfords (I know, Halfords...) that I'm hoping will fit, does anyone have any experience with this or know if this is correct? If it's not, is there anywhere else I should be looking to get a replacement from? I'll attach a photo of the locking nut if that helps. 

Thanks in advance! 

 

Link to the set - https://www.halfords.com/motoring/car-accessories/locking-wheel-nuts/mcgard-locking-wheel-nuts-24154su-277335.html