This is how I "drilled" a 1/4" square hole in round stock.
ROSE INDEX LINKS--
The ROSE INDEX is protected by an approved U.S. Patent.
It is mfg. in the USA.
Link to LakeShore Carbide for purchase: https://www.lakeshorecarbide.com/
Link to 3 minute video if about the index: https://www.youtube.com/watch?v=5ANx2AzPJzE
I am NOT paid to show these links!