Size of Spanner Bit for Bradford Guardian

[JJ_Colt45]

Hey I was just hoping someone could tell me what size the spanner bits on the Bradford Guardian 4 knife scales are? And if they are the same size on all of the Guardian knives 3 through 6 ?
Thanks JJ

 

[Sillyship]

I have been told that the 3 takes a Size 4 spanner. I was told that by the Bradford rep when I called in.