Felting needles are barbed needles that can be used to interlock wool fibers. As the needle is moved up and down, the barbs catch the scales of the wool and entangle them, creating felt.
 
This pack of four  felting needles are 38-gauge star needles.  The 38-gauge star needle is four-sided and leaves a smaller hole in the felted surface. It felts more slowly than the large-gauge triangle needle, producing finer detail.
 
 The is one of  my favorite   needles !!!