Dorian Tool E25M-R-ADTUNR-16, 25mm Diameter JetStream Thru Coolant Carbide Boring Bar, Righ Hand, With -3-Degree Lead Angle, For TN_-33_ Inserts, With 32.5mm Minimum Bore and 200mm Overall Length, MPN: 60085, Features 6xDiameter Boring Ratio (8xDiameter under favorable conditions), Thru-Coolant, 1/2 (12mm) or larger bars have threaded ends for easy coolant connection, Precision ground solid carbide body for high rigidity in deep hole boring, Brazed head is heat treated to 40-44HRC and precision machined to accept standard inserts