Sandvik Coromant CoroTurn 107 Carbide Turning Insert, CCMT, 80 Degree Diamond, MM Chipbreaker, GC1105 Grade, TiAlN Coating, CCMT 431-MM, 1/2" iC, 0.0157" Corner Radius (Pack of 10) CoroTurn 107 screw clamping system uses positive inserts with a 7 clearance angle. 80 degree diamond turning insert, insert size is 431 Medium Chipbreaker, AeroSpace 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. TiAlN coated grade with excellent adhesion, also on sharp edges, guarantees toughness, even flank wear and outstanding performance in heat resistant super alloys