The tool geometry (with up to 138 parameters) has been developed and optimised during long-term tests in co operation with users for the different sections of structural steel, aluminum casting, machining steel, VA steels, heat-resistant steels and tool steels. Selected hard coatings increase the range of applications. The objective of developing Swiss+Tech's 'Black Ring' Taps was the realisation of narrower tolerances and more efficient cutting times for the thread production. The unique general purpose properties of these taps guarantee high productivity by reducing the amount of time spent changing taps for different materials and at the same time reduces the number of taps required by the machine shop. Swiss+Tech 'Black Ring' machine taps with their wide range of applications are the result of years of experience in metal cutting. Features and Benefits HSS-Co construction for increased toughness Deigned for applications involving blind holes Right Hand spiral flutes for ri