Ned Simmons wrote:
On Fri, 28 Nov 2008 10:52:30 -0500, Bob Engelhardt
wrote:
... "The spanner wrench would
lock it." ...

But that sacrifices a big advantage of the keyless chuck -- that it's
not necessary to use a tool to operate it.


This is only when I need to run in reverse. E.g., backing out a tap.
Hand tightening works very well for forward drilling.

Bob