Hotblade tempo 2012 putter the hotblade tempo 2012 putters have been individually handcrafted from the finest 303 stainless steel and feature hotblades secret seven technology a circular pattern cnc engineered into the face that removes small particles of moisture and grit from the impact zone of the putter the intertwining circles also create 7 subtle lines to improve roll off the putter face and combined with the soft 303 stainless steel promote less skid and provide exacting feel on the