One Hand-Two Wrench Technique for Mounting Router Bits
It takes two wrenches to loosen and tighten the collet on my router. One wrench prevents the spindle from turning while the other (shown in red in photo) turns the collet nut.
So the way I make bit changes is like you see in the photos above. With this method, one hand is all I need to make the change.
Since I am using only one hand, it keeps me from slamming my knuckles together when the nut breaks free. And I’m less likely to over tighten the collet.