Precision Balanced to 12,000 RPM.

• .0002” Taper-Arbor Runout Tolerance.
  Means more cutting tool life and better surface finish.
  
• Made of 8620 Alloy Steel with Case Hardness of 56-60 HRC and Core Hardness of 36-40 HRC.
  Translates into durabality and rigidity.
  
• Tapers Ground to AT-3 Specifications or BETTER.
  Ensures precise fit with max contact surface area with machine spindle.Translates into more cutting tool life and better surface finish.
  
• H5 Arbor Tolerance.
  Provides a very close tolerance fit with minimum runout between the tool holder’s arbor and the cutting tool. Translates into more cutting tool life and better surface finish.
  
• Made in Italy