POWERTEC70250 6 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, 5 pack

6" too large for my dryer vent. 4" too small.Returned for 5 " size & works well.

These hose clamps work great, they are for left hand spiral dust collection hose, No tools needed to tighten or remove. They don't have to "climb over the wire spirals in the hose the way the standard hose clamp works.

For a 4 inch bridged hose clamp, these work great. The very last thread is at the 4 inch mark. I feel it should have had about a quarter inch more threads. These were for the left hand wired dust collection hose which is the industry standard. Rockler has proprietary right hand thread hose and bridged clamps. Make sure you are getting what you need, left hand or right hand. I would have given this a 5 star if it had a few more threads for the screw to catch on. I purchased a 10 pack and will get more if needed. Powertec is the only brand that I can find in the 4 inch bridged hose clamps (other than Rockler which is bridged in the opposite direction than what I need). Over all, this is a good purchase.

Like many other commenters I ordered these and they’re incorrect my fault not the products fault. I bought these for my Rocker Dust Right Hose kit. Rocklers dust hose is a right hand spiral. My only minor complaint is that the outfeed from the clamp passes right under the thumb screw making it difficult to turn until enough outfeed passes that you can pinch down and make turning easier.

I like these a lot more than standard hose clamps and it feels like they create a much better seal since they compress the whole hose uniformly. The thumb screws are also a lot easier than trying to fit a screwdriver. Just need to be careful that you get the right direction.

I finally got right size my mistake. I use for vacuum bag . Works great.

too thin (minimal width of strap section is likely to end up cutting vinyl dust collector hose

These amazing clamps clamped amazingly well.