The Robert Charles Plain Shank Counterbore – Standard Metric is a precision cutting tool designed for accurate counterboring in metric-hole applications. Suited for engineers, machinists, and workshop professionals, it delivers repeatable, clean bores with reliable performance.

• Plain shank design: A standard cylindrical shank that fits common tool holders for quick setup and repeatable alignment.
• Standard metric sizing: M8 counterbore configuration tailored to metric hole standards and fastener applications.
• Precision-ground cutting edges: Sharp, accurate form ensures clean, square counterbores with minimal burrs.
• Stable cutting performance: Design optimized for consistent depth control and reduced deflection during operation.
• Versatile workshop use: Ideal for general engineering, automotive, and maintenance tasks in busy shops.
• Reliability and durability: Built to withstand daily use in professional environments while maintaining accuracy.

This counterbore helps you achieve flush-fastener seating with confidence, improving joint strength and surface finish. The compatible plain shank and metric sizing streamline setup across multiple pieces, saving time and reducing the likelihood of misalignment. By delivering clean walls and consistent depths, it minimizes rework, speeds assembly, and supports higher repeatability in production runs.