Features & Benefits: Problem-free threading of blind and through holes in specific materials. Manufactured from a special powder metallurgy tool steel for unbeatable toughness, edge strength and wear resistance. Significant reduction in axial forces increases thread accuracy, whilst significant torque reduction reduces machine wear and decreases risk of chipping or breakage. Yellow, Red and Blue Shark spiral flute taps feature special edge treatment to increase strength and minimise risk of micro-chipping on the cutting edges, considerably improving performance and tool life. Blue Shark for Stainless Steels Up to 10.00mm - DIN 371 Over 12.00mm - DIN 376