12 point 32 mm deep well socket and make sure it is deep enough I could not find a 32 mm 12 point deep well socket deep enough so I bought 2 deep well sockets and I cut the top half of one socket with a chop saw do to the hardness and I tack welded the 2nd socket to the cut off first socket that made it deep enough. I could find a lot of 6 point deep well sockets that was deep enough but a 6 point will not fit the nut. I got a cheep analog fish scale from Wal-Mart to set the pre load . I used the spanner wrench that was in my silverwing tool kit.