"Art" wrote in message
ink.net...
I bet you have a Whirlpool dryer or a Kenmore built by Whirlpool. For some
reason they make their exhaust duct way too short. Notwithstanding it is
posssible to secure the clamp if you put the screw mechanism on the bottom
where it is hard to tighten. Don't ask me why it is so poorly designed.
Be sure to use metal ductwork and a screw type collar.

Yes I have a Kenmore. The collar is not the thin strip with a screw...it is
an aluminum collar about 2 inches wide that was kind of a "junction" between
the dryer exhaust port and the metal tubing.