Dorian 73310150815 Indexable Turning Toolholder, MTGNL12 3B, TNMG Insert, 90° Approach, Left Hand, 4 1 2 in OAL G1120804 Operating Temperature (Minimum) 350 Degrees Operating Temperature (Minimum) 350 Degrees F Imperial Tape Width 1 7 8 in Features Hardened to 44 HRC Side Cutting Edge Angle 0 Degrees Toolholder Style MTGN Shank Material Alloy Steel Lead Angle 0 Degrees Rake Angle 7 Degrees Inscribed Circle 0 Clamp Screw XNS 36 Clamp CL 6 Shank Square Style MTGNL12 3B Insert Shape Triangle Rake Negative Type TNMG Holder Insert Screw NL 34L Shim ITSN 322 Cutting Direction Left Hand Insert Holding Type Clamp and Lock Pin ISO Number MTGNL123B Insert Clearance Angle 0 Degrees Approach Angle 90 Degrees ANSI Code MTGNL123B Cutting Application Turning Insert Inscribed Circle 3 8 in Insert Style TNM