Just picked up a 1/2" drive, 5/8" swivel impact socket with a really short extension from Snapon. Seems to be one of the better ways to get a top starter bolt on a DT466 in an all wheel drive International Workstar(?)
I also had to get a 1/2" drive, 10mm allen socket from Matco to work the head bolts on a Nissan L24. Snapped that because I drove it with an impact ( bad on me), so I picked up a 3/8" drive 10mm from Snapon so I could keep working.
BTW, that L24 head had some stuck and broken exhaust studs in it. Did the usual "grab it with a vise grip and whack it with a hammer" deal. No budge. Figured I'd end up breaking them, drilling them and re-tapping the holes. On a whim, bought a metric stud remover kit from Snapon. The stud came out effortlessly!! Then the next one did! So the next day, bought a standard kit from the Matco guy. Tried it on the Ferd flathead I have sitting in cue. Same deal!! Why haven't I got these stud remover kits sooner in my life !!
Oh yeah, also picked up a Bluepoint ratcheting wrench set in metric to match the standard set I already had.