Odyssey Black Series Tour Designs 2 Putter Craftsmanship/Design Precisely crafted pieces of art, each Black Series Tour Designs putter is milled of 1025 carbon steel for the soft feel demanded by the best players in the world. A.R.T (Advanced Roll Technology) The multi-material construction of each Black Series Tour Designs Putter combines a 1025 carbon steel body with a tungsten flange resulting in a lower and deeper CG for better, quicker and truer roll. Deep Black PVD (Physical Vapor Deposition) Finish A premium, high tech process that produces a durable, non-glare finish was added in response to feedback gathered from Tour players. TD Milled Face The deeper, sharper milling pattern increases interaction between the face and the ball, providing better feel, truer roll and more consistency.