Azev A key.

[RossYB]

Mine have allen key bolts?

Were they the ones for sale on DoneDeal/Adverts?

These have like a 3 pin kind of a key.? Like a triangle shape really.!

Ah okay, Mine are allen keys.

This it?
http://www.adverts.ie/car-parts-accessories/key-for-center-cap-of-azev-alloy-wheels/2243935

Late 80s/90s Ford RS wheels used a very similar key. (Possibly the same?)