Crash Knobs / crash Knobs

Hi all have another mind boggling question got some crash knobs for my zx7r they are brand Pro Tek from the states but my question is? Is there a special tool to use to tighten bolt as no sockets fit within the knob to tighten the bolt.

Any help would be good

pro tek.gif (4.61 KiB) Viewed 1484 times

Is it like allen key or is it a standard bolt?

Allan key for one thats fine but the other one is a bolt

Tube spanner

prob a similar tool u would use to pull spark plugs out of twin cam engines!

Thank you all I was down at super crap auto and got a tube spanner as also stated by robracer and after a well spent $1.99
knobs are on tight as a tiger