The Baer circular die in 5/16" x 18 BSW Left-Hand is a precision external-threading tool designed for machinists and DIY enthusiasts who need reliable left-hand threads on small cylindrical parts. Built for general-use applications, it delivers clean, consistent threads when paired with a standard die stock.

• Thread Size & Type: 5/16" diameter, 18 TPI, BSW, with left-hand threading for reverse-threaded assemblies.
• Material: High-Speed Steel (HSS) construction for durable cutting edges and long service life.
• Cutting Edges: Precisely ground edges tuned for smooth engagement and accurate thread formation.
• Compatibility: Designed to be used with a die stock or die holder for controlled rotation and steady cutting.
• General-Use Design: Versatile for a wide range of metals and fabrication tasks, making it a reliable addition to any threading toolkit.

When you need dependable external threads on small shafts or rods, this Baer circular die delivers consistent results with minimal rework. The combination of HSS durability and precision-ground teeth means clean, accurate threads that bite smoothly into mating parts. Left-hand capability expands your options for specialized assemblies and maintenance tasks, while compatibility with standard die stocks keeps your workflow efficient. Pair with proper lubrication and a quality die stock to maximize tool life and achieve repeatable results across steel, brass, and other common metals.