SOMT-DT: Inserts with a DT chipformer for DR drills, for general applications at medium-to-high feed rates. Grade: IC908 A hard, fine grain substrate with excellent chipping resistance, combined with a new TiAlN PVD coating. Provides high wear and oxidation resistance. Recommended for a very wide range of materials applications and machining conditions. ISO Range - P/M/K: (P15-P30)(M20-M30)(K20-K40) ISO Range - H/S/N: (H10-H20)(S10-S25) Grade or Coating Type: PVD Grade: IC808 A hard, fine grain substrate with excellent chipping resistance, combined with a new 'SUMO TEC' TiAlN PVD coating. Provides high wear resistance. Recommended for a very wide range of materials. ISO Range - P/M/K: (P15-P30)(M20-M30) ISO Range - H/S/N: (H10-H20)(S10-S25) Grade or Coating Type: PVD Coating Layers: TiAlN/AlTiN+TiN