... are the most professional way to secure any ducting. Clamp,Ducting,metal Clamp,nylon clamp,plastic clampMade from zinc plated steel, these metal ... air pressures, temperatures or condensation.To use-Simply loosen the clamp with a flat blade screwdriver or 1/4 hex driver ... , slip the clamp over the ducting,position correctly and tighten screw firmly in ...