Robert Charles Metric Piloted Countersink - 3 Flutes - Integral Pilot - Straight Shank - 2.5mm Pilot Diameter - 100° Inclusive Angle

The Robert Charles Metric Piloted Countersink is a precision tool designed to countersink metric pre-drilled holes with exceptional concentricity. It’s ideal for engineers, technicians, workshop professionals, and hobbyists who need clean, flush screw seats in metal, plastic, and composite parts. Built for repeatable accuracy, it helps you achieve professional results in every job.

Equipped with an integral pilot and a 3-flute cutting geometry, this countersink delivers accurate alignment, minimal chatter, and smooth cutting across a range of materials. The straight shank ensures easy mounting in common milling and drilling setups, while the 2.5 mm pilot diameter and 100° inclusive angle provide versatile performance for metric hole sizes and standard hardware.

• Integrated pilot for precise alignment: Keeps the countersink centered in the hole, preventing wander and delivering concentric countersinks every time.
• Three-flute design for smooth cutting and chip evacuation: Reduces cutting forces, enhances stability, and promotes efficient chip removal for cleaner edges and longer tool life.
• Metric-ready, versatile geometry (2.5 mm pilot and 100° angle): Optimized for metric pre-drilled holes and a wide material range, including steels, aluminum, and plastics, with a straight shank for broad machine compatibility.

Designed for reliability and consistent performance, this countersink helps streamline setups, reduce rework, and deliver repeatable, professional finishes across workshop, maintenance, and production environments.