Brillife 2Pcs Wood Drill Bits Square Hole Drill Bits Woodworking Mortising Chisel Countersink Bit Kits Tools (3/8" 1/2")

I completely misunderstood the application- apparently you need a drill press. I missed this requirement before. But the products seemed high quality when handled. Maybe the exact application should be emphasized more.....or maybe u shouod read more carefully. Lol I thought you could use these with a regular hand drill.

First attempt went smooth although I haven't really done anything too creative. Square holes works rather well although time will tell

They don't really cut a square unless you are in some very soft wood.