Why does this rotary encoder have both PCB pins and mounting screw?

liudr:
I might have to get a drill press stand for it.

I got one of those last Xmas* ... the problem is you can't really get any decent size drill bits for it. The biggest bit I could find that fits in a Dremel chuck was 6mm. I might have to get one of those reamers...

  • My girlfriend bought it for me, this year she's getting a bandsaw in return (but don't tell her!)