Leister Triac Standard Pencil Tip 90 Degree Nozzle 5 mm is push-fit with a screw to be able to tighten for a secure fit. Triac 5 mm Pencil Tip 90 Degree Nozzle fits on a Leister Triac-ST or Triac-AT Hand-Held hot air welder. Great for welding under toe-kicks.