Engineered for precision keyseat work in woodworking, the Europa Tools Woodruff Cutter (HSS-E cobalt, 13.5 mm x 2.5 mm) delivers durable performance for professional woodworkers and serious hobbyists. Built to resist heat and wear, it maintains clean, accurate cuts across demanding routing tasks. Material: HSS-E cobalt alloy provides exceptional hardness, heat resistance, and wear resistance for longer tool life. Profile: Semi-circular cutting edge with a flat bottom creates precise keyseat slots and smooth seating surfaces. Size: 13.5 mm cutting diameter with a 2.5 mm cutting width for accurate keyway dimensions. Cutting performance: Sharp edges and efficient chip evacuation deliver clean, consistent cuts with minimal tear-out. Model: 158116 designation is known for reliability and precision in woodworking applications. With this Woodruff cutter, you can produce precise keyseat slots that securely accept wooden keys, improving joinery alignment and reducing play in keyed assemblies. The cobalt-enhanced tool resists wear during routine routing, minimizing downtime for sharpening or replacements. Its optimized geometry supports smooth bottoms and predictable cutting behavior across a range of woods, making it a dependable choice for cabinetry, furniture making, and other joinery tasks where a precise fit matters.