Drill Chuck: 0

Why yes, they DO come off.

It took quite a bit of abuse to do so, probably made worse by trying to cut a 2-3/4″ hole in steel.  The chatter exploded the original chuck.

Two Boys vs. Shed

My boys (7 and 9) pulling down garden shed #2.  Once the tree (and snow) is gone, we begin construction of my fictitious workshop.