Allen Head Size for Rear Rack Install?

[widude]

Thanks, yes, my Allen wrenches could be out of order, still I go from to small to larger than required. I have another set around I will look for. These are the factory Allen head bolts that come off to attach a rack.

Another update, the package today was my S.W. Motech 'crashbars'. I thought the rack was in the same package but no. This means I have more time to get the correct size Allen tool to remove the bolts.

The S.W. crashbars went on fine, subtle but quality looks excellent.