No one sells a 1/4 inch upcut spiral bit that cuts 2 inches in length
anywhere - not Rocker, Woodcraft, Lee Valley, Home Depot etc.
After 2 weekends of searching online I finally found this obscure maker
called SpeTool. The only manufacturer. See snapshot below.
It's not 1/4 inch diameter but a little bigger like 1/4 + 1/8 and ruined the dimensions on my project.
If you know of any reputable manufacturers, please let me know.
I found 2 inch cutting depth/length for 1/2 inch diameter but none for 1/4 inch .
I'm beginning to think maybe 1/4 diameter is so thin that if it's too
long, the bit is going to snap and break in two so no one is going to
sell or make it.