?The unique geometry of the XT inserts provides excellent chip control. ?XT Inserts are designed to increase hole quality, surface finish, and true position when compared to other competitive products. ?The helical margin desgin provides maximum durability and stability. ?C1 carbide is primarily for steel applicators. This carbide offers wear characteristics similar to C5 carbide. In addition to its wear characteristics C1 carbide is considerably more durable when compared to other carbide grades. ?C2 is for use in non-ferrous applications (high temperature alloys, stainless steels, aluminums, cast irons). It offers exceptionally high wear resistance. High machine tool rigidity is required. ?Point angle is 140 Degrees. ?AM300® Coating provides increased heat resistance over AM200® coating, up to 20% increased tool life over AM200® coating and superior tool life at high penetration rates.