Fulton4 Inch Thumb Screw Key Adjustable 304 Stainless Steel Hose Clamps, Pipe Clamp, Worm Gear Clamps, Dryer Vent Clamp, Dust Collection, Automotive, RV Clamp 10 pack (4" Hose Clamps)

Takes two hands to tighten down, might as well use the less expensive threaded bolt.

These clamp tight and are very easy to use.

The attached wing nut is difficult to tighten. A couple of them really were a struggle. The strap itself is a bit flimsy.

Don't bother with a flat head screwdriver for attaching/detaching hoses again once you have these beauties

These are a lot easer to use than the one's without the thumb screw unless you are using a frill with a 1/4 bit to clamp it down. If you want something easy get some of the spring clips that you squeeze and you will never use anything ela=se

Using in my shop for my new air filtration system, seal the saw dust in the system of bags. Just what I needed and fit the four inch hose connections.

Good deal easy to use great for dust collection system

Why does the review ask about suction power?

I love these and can highly recommend them for anyone who hates slot screw drivers as much as I do!

Je les utilise pour tenir mes tuyaux d aspiration de 4 pouces de collecteur de poussiere dans mon atelier. Ca fonctionne mais la capacité de serrage n'est pas tres forte, la poignée etant petite. Ca fonctionne tout de meme bien si je brasse pas trop les tuyaux.

Very easy to use. Gearing mechanism is smooth.

I don't like the fact that as you tighten these and the the metal comes out where you twist,then it jams it up making it a pain to tighten!