POWERTEC 70260 4 Inch Key Hose Clamp, Thumb Screw Key Adjustable Stainless Steel Hose Clamps for Dust Collection, Dust Collector and Dryer Vent Hose, Pipe Clamp, RV Clamp, Worm Gear Clamp, 10 pack

These work best when changing that pesky dryer vent. So happy with these, easy to use, no fuss, strong clamp, universal fit. Does come with 2 sizes, I opted for the 4-inch fit and had no problem. These will last forever given the density of material and the thumb protection padding

Grandma here ... needed to revise the connections for the dryer vent. These key clamps make it easy to get the job done quickly and without tools. Good quality. They should last for years. The hardest part was getting behind the dryer!

Fit and worked like a champ. Easy turning with thumb, one handed.

Worked perfectly on our recent dryer installation. You're going to need some grip strength for these, but you don't need to be Hercules to use them. The tabs are a decent size so it is easy to get a good hold on them while you're laying on the deck sideways cussing the hose. They don't compress enough on the hose once it is removed to damage it so you should only have to do it once.

These are so easy to use, my only style of clamp I use.

Really nice clamps .i love the thumb screws.

This past summer I installed a barn-wide dust collection system made from different types of 4" pipe. These clamps replace and are used ON ALL joints on that new system. So far, with 5 heavy duty machines a planer, bandsaw, lathe, table saw, and jointer all feeding into a single dust collector..... with on/off valves.... the clamps have all held, have remained in place and tight. I wouldn't use these clamps on something that has a lawn application because of the plastic 'nut.' Other than that, they are super.

These are well made and work very well.