Allen key size for Badass bridge?

[ethnotime]

I'm trying to lower the action on my bass but I can't find the right allen key size! Grr! The hardware stores near me don't sell singles so I had to buy a set and I bought the wrong one! I'm using a badass bridge (II I think).

Thanks.

[Vic Winters]

I was told 1.27 mm metric works.