The Dormer F300 HSS Circular Split Die is a high-quality threading tool designed for precision and durability. Made from premium High-Speed Steel, this circular split die ensures superior strength and long-lasting performance. The Dormer split die is engineered for optimal performance and reliability. Its circular split design enables fine adjustments, ensuring precise and consistent threading. The high-speed steel construction ensures the die can handle demanding tasks, maintaining its performance even under heavy use. Features & Benefits • High speed steel with bright finish • BS 1127:1950 • M thread form • Right hand rotation/cutting Specifications • Thread Diameter: M4 • Outside Diameter: 13/16” • Thread Pitch: 0.7mm