What sizes are "#6 and #5 Allen key"? My scooter calls for "#6 and #5 Allen key", I can't figure out what sizes (in inches or mm) these translate into.  I know I need to buy an allen set, but wanted to make sure it has the two sizes I need before purchase.  I think this may be 5mm and 6mm, but thought it was a really funny way to phrase that, so I was hoping for confirmation.

http://www.sidewalkerusa.com/pdf/willy-assembly.pdf

The #5 Allen key is for the brakes and #6 is for the handlebar.
'#5 would be 5 mm
10 mm = 1 cm  

Most bike shops will have kits / tools with those sizes
Those are very common bicycle sizes  

This tool has 4, 5, and 6