@Jonathan - Which 6mm bits are you referring to? An item on the page in the link I posted or to the two ebay item links? I didn't think either of the ebay links were 6mm?? One is 0.125" (3.18mm) and the other 0.157"(3.9878mm)

I would also assume that I would need a 6mm collet to use 6mm bits with a Kress?

Cheers

ice.