General description The Irwin HSS TCT Tip Drill Bit is designed for precision drilling in various hard materials, including hardened steel, cast iron, bronze alloys, and manganese alloyed steel. Its C2 Carbide Tip allows it to drill materials with a hardness of up to 50 Rockwell C, ensuring efficient performance. Technical specifications Diameter: 14.0mm Total length: 160mm Working Length: 108mm Material: Chrome Vanadium Steel, hardened to 56 Rockwell C Usage When using the Irwin TCT drill bit, it is essential to apply a coolant to enhance performance and extend the drill bit's lifespan. Irwin recommends using a 3-6% emulsion as a coolant during drilling. Other information