So far so Good
28-11401 - 4" Worm Screw Clamp for Dryer Vent Hose
Adjustable from 3-9/16" to 4-1/2" diameter
Two each required for aluminum dryer vent duct (MCM part number 28-11400)
I ordered batteries and a set of test leads. I received them within three days of when I ordered them and I got a great price. Fast service and a great price - what more could you want.