Turn buckle size

[K-Brewer]

Can anyone tell what is the size of the above as the plastic tool to turn them just bends where it's plastic, need to get a small spanner for it or something as I can only find the associated turnbuckle wrench abroad an postage isn't worth it

[Lee1972]

I use one of these as you said the kit plastic one is pants :thumbdown:
http://www.ebay.co.uk/itm/Answer-RC-Turnbuckle-Wrench-7075-3mm-5-32in-/220673838283?pt=UK_ToysGames_RadioControlled_JN&hash=item33612f8ccb