Allen key for prop

[Pilot Paul]

Hi,

Just picked up my first paramotor, a Bailey 4V.

Anyone know what size Allen Key I need for the quick release prop? 
 

Thanks

[alan_k]

The V5 quick release is 10mm, so assume it's the same.

[Pilot Paul]

It’s got 12.9 stamped on it. Is that a measurement? It certainly looks like a 10mm socket 

[alan_k]

The 12.9 is a strength grading.

[Pilot Paul]

Whoops, a little emabarrasing! Told you I was new to all this. 

Thank you for your help, I'll pick up a 10mm key today