Tao is the only scissor in the world that is made from Carbide steel. This makes the edge last more than twice as long as any other scissor in the industry. Every other part of these shears is state of the art. The entire pivot of the shear is lined with low friction polymer inlays. The tension system contains ball bearings, to stabilize the blades. Tao is avaialbe in both a fixed thumb and a rotating thumb version and the rotating thumb also features ball bearings to make for smooth consistent rotation. If you are looking for the absolute best scissosr ever made, come check out the TAO series from SENSEI. Also note that we have many other high quality shears that are also an amazing value, and more speciality shears than any other brand. We make it possible to automate many time consuming parts of hair cutting. Our staff is the most knowledgeable in the industry as well.