As far as I can tell, Xacto only offers the "Z series" Zirconium Nitride treated blades in #11 for the #1 and #3 handles and in #2 for the larger #2, #5, #6, and Woodcarving knife handles.

The #2 Z series blades are MUCH harder to find.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !