Carbide 1.5mm end mill cutting bit with 1/8” shank
$2.00 - $10.00
These are the bits I use in my CNC machine. I only cut 0.5mm deep per pass so the majority of the cutting area has never been used. These are great for cutting away unwanted plastic on your WPL bodies etc while doing your modifications. I use them all the time so I figured you could too.