On Sat, 16 Jan 2010 12:26:35 -0600, Swingman wrote:

Plywood is not 3/4" thick, and yes, there are bits that are sized for
the thickness of modern plywood, generally around 23/32 for 3/4" plywood.

Assuming the OP is not using cabinet grade plywood you are correct.
However, if the project does involve cabinet grade plywood then a 3/4"
piece of plywood is 3/4" thick.

Gordon Shumway

Our Constitution needs to be used less as a shield
for the guilty and more as a sword for the victim.