Using wood flange screws on an old cast iron toilet flange in a house built in the 1950s. There are a few ways to skin this cat, but in this case, these did the trick. Also an overview of options if your cast iron flange is not in as good of shape.

Oatey Cast Iron Replacement Flange insert
https://amzn.to/44jJHDx

Toilet Flange Repair Kit for Flanges with Broken Bolt Rails
https://amzn.to/44g7rZb

3 1/2” Toilet-to-Floor Screws (Fluidmaster)
https://amzn.to/44k7VgX