Can't engage mag swith threads..... :(

[Imapilot]

I have tried hex 1/16 and 1/8, 5/64 does not fit down the hole. 1.5mm and 1.75?mm 2mm does not fit. Tork 8 bit i got on a set does not fit down the hole....


Nothing that fits down the hole grabs threads. Am i missing something here?

 

[Norm]

new set screw tool for Mag D switch
Norm