Globalstar Fuel Spring Clip Kit Set (Pack of 70) Heat treatment and hardened. Smooth on Inside and Will Not Bite into Hose. Easy to Tighten since it is out away from the Clamping Surface Clean, Shiny, and Professional Looking Application Repair to Automotive Fuel Lines, Small Engines, Small Appliances, Vacuum Cleaners, Air Hoses, Beverage Machines etc.