Spiral Flute HSS Cobalt Step Drill Set

• Metric Step Drill Set - Metal Case.
• Bordo Cobalt Spiral Flute Titanium Aluminium Nitride (TiAlN) coated step drills offer unparalleled performance when drilling hard metals such as stainless steel.
• HSS-Co5 material provides increased performance and tool life when machining tough steels.
• High-performance point for faster starting and reduced bit wander.
• 3 flatted shank prevents slipping in the drill chuck.
• Spiral flutes enable easier tool penetration.
• Titanium Aluminium Nitride (TiAlN) is a thin film coating that was developed from Titanium Nitride.
• TiAlN offers higher temperature resistance than TiN as well as slightly higher hardness and especially higher hot hardness (i.e. the hardness at high temperatures).
• It is primarily used in high-temperature environments above the limits of TiN usage.
• This coating works by forming a thin surface layer of Alumina (Al2O3) or Aluminium Oxide ceramic. As the layer wears it continuously reforms.

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