20 mm router bits source

20 mm router bits source: 20mm in metric is essentially the same as 25/32 inches in dinosaur. �25/32 inch = 19.844 mm or essentially 20mm.

If you are willing to use a 1/2 inch shank bit, which is arguably stronger than 1/4 inch or 8mm, the first two sources of American-made router bits I checked have them, Eagle and Whiteside.

Eagle has this one:

Part No.:102-1275, diameter 25/32" carbide length 1-1/4" overall length = 3" shank: 1/2" $22.95

Whiteside has this one:

Part No: 1088, diameter 25/32" , carbide length 1 1/4" overall length 3" , shank 1/2", $17.12