> What is a good source for the small sizes like .025 to .070 inch? Woodcraft has HSS twist bits in wire sizes 60 to 80 (40-13 mils). http://www.woodcraft.com/family.aspx?FamilyID=784 Grizzly has reground CNC bits in random sizes down to 13 mil. http://www.grizzly.com/products/G7950 The carbides are easier to use, but more fragile.