Half drive bolts?
Originally Posted by JMC
Get a 12 point 12mm -½ inch drive socket. Also buy some penetrating oil like PB Blaster and spray the nuts. 
JMC

JMC
Drats. It does look like it was made for a 12 point socket. And I purposely have bought all 6 pts over the years figuring the 6 pt bites/grabs better and there was no such thing as a 12 pt bolt. Oh well.



