Freud Recoverable Bead Glass Door Bits

I am looking at one of the Freud recoverable bead glass door router bit sets. Does anyone have one of these sets? If so what is the minimum thickness stock you can use them in? I am making some doors from 3/4" stock and want to make sure they will work before I purchase them.

I called Freud and was first told 1" then the gentlemen did a measurement and said no 3/4".

Thanks