Precision threading tool tips engineered for cutting ISO metric or imperial internal or external threads. Manufactured from premium BMA-grade carbide, this insert delivers excellent wear resistance, heat tolerance, and edge stability. It performs exceptionally well on stainless steels, hardened alloys, and other difficult-to-machine materials. The optimized geometry ensures smooth chip evacuation, reduced cutting forces, and long-lasting performance for precision threading operations. IR11G60/IR16G60: Designed to cut a 60° metric internal thread profile (e.g., ISO Metric, Unified National) IR11G55/IR16G55: Designed to cut a 55° imperial internal thread profile (e.g., Whitworth, BSP). ER11G60/ER16G60: Designed to cut a 60° metric thread profile (e.g., ISO Metric, Unified National) ER11G55/ER16G55: Designed to cut a 55° imperial thread profile (e.g., Whitworth, BSP).