Hydro Crunch 4 in. Adjustable Metal Worm Duct Clamps can be used to attach aluminum ducts to other aluminum products such as inline fans, booster fans, elbows and pipes. They are ideal for use with semi-rigid or rigid aluminum ducts. Worm drive adjustable with screwdriver for a super-secure fit. Stainless steel finish and rust resistant. 2-clamps per pack.
Easily adjustable using a hex or flat head screwdriver
Worm drive style of these clamps promotes a solid adjustable mechanism to securely fit around the duct