MT5 7 Piece Interchangeable Bull Nose Live Center Set ~ Used for CNC machines. ~ Fine adjustment for better grip. ~ Made of hardened tool steel and ground to high accuracy. ~ Two special designed high-quality bearings. ~ Can be lubricated through a hole on head for smooth operation and longer bearing life. ~ Heat treated to HRC 60. ~ Kit includes the live center body, 3 bull nose points, 2 cone shaped points, 1 serrated point and 1 wrench. ~ Maximum RPM is 3,000. ~ Load rate is 4,400 lbs.