Sandvik Coromant CoroTurn 107 Carbide Turning Insert, DCMT, 55 Degree Diamond, MM Chipbreaker, GC2025 Grade, Multi-Layer Coating, DCMT 3(2.5)2-MM, 3/8" iC, 0.0315" Corner Radius (Pack of 10) CoroTurn 107 screw clamping system uses positive inserts with a 7 clearance angle. 55 Degree diamond turning insert single sided, insert size is 3(2.5)2, no. of edges 2 Medium Chipbreaker, Stainless Steel Application This single- sided insert is used mainly in small tools for internal and external machining. The inserts are clamped with a screw through a center hole. The CoroTurn 107 is the first choice system for internal longitudinal turning of small diameters, and is also used for external light roughing to finishing of smaller components. Multilayer coating combines TiCN, Aluminum Oxide, and TiN for roughing and light finishing on austentic and dubplex stainless steels