Grindingnoise can't unscrew casing for food disposal to take out glass in it

I have started disassembly but my drill bits don’t fit the screws they use on casing They are starshaped,but don’tfit Phillipshead bits…What to do???

The star shaped screws are probably Torx.
You will need a Torx driver set available at most harware and auto supply stores.

Torx - Wikipedia, the free encyclopedia