HQ carb adjustment wrench?

Feeling stupid and hoping someone has seen this. I bought an OEM carb for my 440 Husqvarna chainsaw and found that my 21 tooth spline jet adjustment tool is too small to fit on jet spline. Thought it was a bad carb so I sent it back and bought a second carb from a different dealer and had the same problem. Figured it must be my tool, even though it works on the original 440 carb and another HQ chainsaw i have, so I bought another 21 tooth spline wrench and the new one doesn't fit either. They go into the carb body but not over the jet spline. Any idea what's up? Thanks
 
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