This part will save 30 minutes of your life! First be sure you've got a 1350 CV (1310 takes a shorter version ;). A 5/16-24 bolt from the hardware store has a 7/16" hex head. Your typical CV head doesn't have enough space around the bolt hole to fit a 7/16" socket, so you end up using an open end wrench. It takes a lot of life when the bolt's 24 threads per inch, a quarter turn at a time, and you need to do four of them (maybe eight for both drivelines). By utilizing a 5/16" 12 point head, you can stick a 1/4" drive onto your 12 point 5/16" socket, and bam! Takes no time, saves life, and it's cheap.
