Toolex Reamer — a straight-shank, spiral-flute reamer in HSS-E, built for precise 3.97 mm hole enlargement and finishing. Designed for machinists and shop floors that demand consistent bore quality and reliable tool life.

• Diameter: 3.97 mm
• Shank: Straight shank for compatibility with a wide range of toolholding systems
• Flute Design: Spiral flute for efficient chip evacuation and reduced clogging
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat resistance
• Application: Ideal for precision hole enlargement and finishing across a broad material range
• Performance: Durable construction delivers repeatable bore quality and longer tool life

When you need to enlarge an existing hole or achieve a precise, smooth bore, this reamer delivers. The spiral flute channels chips away from the cutting edge, reducing buildup and heat, while the straight shank ensures easy clamping in most toolholding setups. Built from cobalt-enhanced HSS, it stands up to demanding cutting conditions and provides consistent tolerances across multiple passes. Suitable for a variety of metals, this reamer helps you achieve accurate diameters and clean surface finishes, improving part fit and overall machining reliability.