Pramet Turning Insert Pramet, WNMG Insert, 331 Insert, Trigon, 0.118 in Maximum Depth of Cut, 3/8 in Inscribed Circle, 3/16 in Thickness, 6 Seat, Negative Rake, FM Chipbreaker, 1/64 in Corner Radius, 0.15 in Hole Dia, Manufacturers Grade: TT310, ANSI Code: WNMG 331-FM TT310, ISO Code: WNMG 060404E-FM TT310, 80 deg Included Angle, 0 deg Relief Angle, Carbide, Material Grade: M, P, For Use On: Stainless Steel and Steel