Indexable Milling Insert Lead Angle 0 Degrees Insert Shape Square N331.1D Chip-Breaker PM Grade 1020 Inscribed Circle 0.512 In. Insert Thickness 0.258 In. No of Edges 8 Mounting Hole Dia 0.171 In. Nose Radius 0.079 In. Coating PVD Rake Negative Cutting Direction Neutral Mounting Style Screw Clamp Workpiece Material Cast Iron Application Milling