This is a fine gauge needle with a triangle blade shape (three blade edges) that I does a great job for all-purpose needle felting.  It works great for flat needle felting and for sculptural needle felting.  It is sharp and glides through the fiber with ease while felting up a project fast and smooth.
This needle grabs and felts fiber so well making it a favorite for those that felt with fine fiber such as Alpaca fiber or Merino wool and for those that prefer a coarser wool such as Corriedale.