Dewalt 611 collet limits

I know the 611 collet will take 1/4 and 1/8 in bits with adapter.

What mm bits will fit the 1/8 in collet?
What mm bits will fit the 1/4 in collet?

Would a 3/8 chuck work safely in the router?

You need a collet for each size.
Elair sells them for the DeWalt.

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what he said. I use a 1/8 for 3mm as well. Other than that you’re going to do more harm than good using a ‘I guess its close enough’ collet.