VIVOSUN Stainless Steel Duct Clamps 6 inch (Pack of 2) Pack of 2 clamps. Variety of applications, easy to install. Stainless steel and rust resistant. Worm drive adjustable with screwdriver for a super secure fit. BeltHoleDesign:Firmlyfixed. StainlessSteelMaterial:RustproofandCorrosion-resistant,HeavyDutyandDurable.