Robert Charles Plain Shank Counterbore in M35-HSS-E with 5% cobalt is built for professionals who demand durability and precision in metalworking. This high-performance counterbore is ideal for precision engineering, automotive work, and general workshops where clean, repeatable counterbores are essential.

• Material and cobalt content: M35-HSS-E with 5% cobalt for improved heat resistance and wear life, maintaining sharpness under demanding cutting conditions.
• Plain shank design: Easy fit in standard tool holders, enabling stable, reliable machining without special adapters.
• Pilot size: 0.127" pilot provides a precise starting point for accurate hole geometry.
• Cap screw compatibility: Sized for #4 cap screws, ensuring proper clearance and seating in assembly work.
• Counterboring performance: Engineered for clean, accurate counterbores with consistent depth control.
• Ideal applications: Suitable for precision engineering, automotive fabrication, and general metalworking environments.

In use, this counterbore delivers true, repeatable results that improve part fit and finish. The cobalt-enhanced alloy stands up to extended cutting cycles, reducing tool downtime, while the plain shank simplifies setup and maintenance in busy shops. For craftsmen and technicians who value consistency and reliability, it provides a dependable solution for producing precise countersinks in stainless steel, aluminum, and other common metals.