External ISO Metric (DIN13 12-1986 class: 6G), laydown threading inserts. ER/L - ground periphery and rake, ERB - with a chipformer and peripherally ground, ERM - with a chipformer. Application: general industry.
Internal, ISO metric (DIN13 12-1986 class 6H) laydown threading inserts. IR/L - ground periphery and rake, IRB - with a chipformer and peripherally ground, IRM - with a chipformer. Application: general industry.