Pramet Turning Insert, DCMT Insert, 21.50.5 Insert, Diamond, 0.039 in Maximum Depth of Cut, 1/4 in Inscribed Circle, 3/32 in Thickness, 0.307 in Length, 7 Seat, Positive Rake, UR Chipbreaker, 1/128 in Corner Radius, 0.114 in Hole Dia, Manufacturers Grade: T8330, ANSI Code: DCMT 21.50.5-UR T8330, ISO Code: DCMT 070202E-UR T8330, 55 deg Included Angle, 7 deg Relief Angle, Carbide, Material Grade: H, K, M, N, P, S, For Use On: Aluminum, Cast Iron, Hardened Steel, Stainless Steel, Steel and Titanium/Super Alloys