One-piece solution with smooth internal surfaces provides for easier wire routing, protection, and installation | Easy permanent assembly: the installer twists the tubing over the connector ferrule | Unique locking fingers accommodate various panel thicknesses | All nylon construction is resistant to salt water, weak acids, gasoline, alcohol, oil, grease, and common solvents. (This feature is not assessed by UL certification and testing.) | Suitable for a wide array of electrical applications: Commercial and Industrial HVAC Systems, Motorized Equipment, Enclosed Power Sources, Garage Door Openers, Major Appliances | Finishing collars available to neaten rough cut tubing ends | Assembly Tool available for assembling Quick Twist Fittings into HF1 and HF2 Conduit and Tubing.