The two piece ones are their even more expensive ones. thier base models are the same as everyone elses.
http://www.mcgard.com/search/default...vID=1&NavID=11
Not sure they actually buy you anything for the extra buckos.
Spline drives are a pain IMHO because of the stupid ultraweak "socket" that doesn't even have a square drive on it you have to use, and you are not supposed to use impact tools on them. It is like having "locks" on every lug. PITA.
I'm partial to the "Acorn Bulge" style for the street.
http://www.gorilla-auto.com/products...=249&sfID2=249