In article ,
says...

Which brands use the 2" through hole? I've never used one,
in 20 years of locksmithing.


Oh, come on Stormin. Schlage, Kwikset, Defiant, they all use the 2"
hole through the door face, and a 7/8" hole in the edge. You use an
installation set like this one to drill the holes, adjustable for either
a 2 3/8" or 2 3/4" backset. Every new pre-hung door I have ever
seen comes pre-drilled with a 2" hole for each lockset and dead bolt.
Are we talking about different things, here?


http://cgi.ebay.com/American-Tool-17...stallation-Kit
_W0QQitemZ390029833640


--
Dennis