CNMA432-AC415K, CNMA120408 AC415K aka 192R271 is a .031″ corner radius 1/2″ I.C. FLAT TOP Super FF coated Turning insert for high speed (up to 600- 2,000 sfm) interrupted cut for machining in Cast Iron materials. This insert needs a minimum of .031″ doc to cut properly but can cut up to .240″doc at .004-.015″fpm. This is a Super FF Coated insert