Pramet Turning Insert, DCGT Insert, 21.51 Insert, Diamond, 0.083 in Maximum Depth of Cut, 1/4 in Inscribed Circle, 3/32 in Thickness, 0.307 in Length, 7 Seat, Positive Rake, AL Chipbreaker, 1/64 in Corner Radius, 0.114 in Hole Dia, Manufacturers Grade: HF7, ANSI Code: DCGT 21.51F-AL HF7, ISO Code: DCGT 070204F-AL HF7, 55 deg Included Angle, 7 deg Relief Angle, Carbide, PCD Coated, Material Grade: H, K, M, N, S, For Use On: Aluminum, Cast Iron, Hardened Steel, Stainless Steel and Titanium/Super Alloys