How Do You Expand Ditch Light Bracket Hole

Looks like hole is too small for my new KC slimlites. What can I use to expand that ? Is a common household drill ok?

 

Uni bit in a regular ol drill

edit: now seeing a picture you could use a regular drill bit too. Doesn’t look like you have to go much bigger.

 

A hole saw

 

Unibit

 

Shit I don't have a unibit!

 

It's super close

 

Take a round file to it

 

So many ways just drill it bigger

Die Grinder carbide bit

It never fails someone wants me to try one of those stupid uni bits first thing one of my helpers grabs it starts twisting things sideways I guess they have a purpose I never found what it is

 

Carbide burr bits are my go to for something like that. Or you can drill it out with a regular bit, just be sure to use it on the highest speed and use cutting oil.

 

To my understanding, a step drill is best suited to less stout sheet metal.

Don't reinvent the wheel, just drill a hole.