Robert Charles Single Flute Countersink 90° - M35-HSS-E 5% Cobalt - Metric - 25.0mm Head Dia

The Robert Charles Single Flute Countersink 90° – M35 HSS-E 5% Cobalt – Metric is a precision countersink tool designed for accurate countersinking, chamfering, and deburring of metric holes. With a 90° countersink angle and a 25.0 mm head diameter, it helps you create clean, centered edges in metalworking projects for reliable fits and smooth finishes.

Crafted from premium M35 HSS-E with 5% cobalt, it delivers superior heat resistance and hardness, letting you machine tougher materials such as stainless steel and alloy steels with less wear. It’s also well-suited for non-ferrous metals, offering extended tool life and consistent performance across many jobs.

• 5% cobalt-enhanced M35 HSS-E for longer life: The cobalt alloy improves heat resistance and hardness, so the countersink stays sharper longer and reduces downtime when working hard materials like stainless and alloy steels.
• Precise 90° single-flute design: Delivers clean chamfers and deburring with minimal chatter, providing a consistent countersink depth for metric holes.
• Metric-focused versatility: Optimized for metric hole prep—countersinking, chamfering, and deburring—across stainless, alloy, and non-ferrous metals for reliable, repeatable results.

When you include this countersink in your toolkit, you gain faster, more consistent hole preparation, smoother edges, and extended tool life, reducing downtime and improving workflow across production runs.