The Tara XO is a very Popular Shear. The XO is made of high quality Japanese Cobalt Steel which increases the lifespan of this shear and allows the edge to stay sharp longer.. This shear is phenomenal for for Slide and Point Cutting. The thumb opening is unique and referred to as a clam shell, where the width of the thumb opening is wider and has a much larger area of which to place your thumb. Also available in Black, Blue, Gold and Bronze Titanium Coating for stylist with Metal Allergies.