https://www.woodcademy.com/
http://www.holbren.com

Note: In the video I mention a cutting length of 1-1/4", but that is actually the dimension between bearings. The cut length is actually 1-1/8"

My review of Whiteside's Ultimate Flush Trim Bit. Yes, it is expensive, but this bit cuts everything smooth and clean with no fuss. Watch closely at the end and you will see it flush trimming across the grain in red oak with no effort.