Can't find my key! Need a new main switch with key :/

[jkv357]

Well done for getting to the bottom of it. The keys that don't fit, could you take the ridge off very carefully with a Dremmel and use them as spares?
Al.

That's what I'd do.

Might as well give it a shot. Doesn't seem like it would be very difficult to do, but it's odd that it is properly numbered but on the wrong blank.

[e3steve]

Those in your picture don't appear to be original 'Tec' keys, but copies cut into poorly-made blanks.

There are two lock manufacturers that I can recall: Tec and Niles. Tec keys are Txxxx, and Niles are NAxxxx & NBxxxx.

I'll post a pic of my OEM Tec key later this week, as a reference...