Festool 577999 Spiral Blade HW 82 SD HLC 82 is a spiral blade specifically designed for the HLC 82 cutterhead to ensure smooth and efficient planing performance. Its shear-cutting geometry gradually removes material at an angle, which results in cleaner surfaces, less tear-out, and quieter operation. This blade is i for a wide range of planing tasks, delivering reliable and precise results every time. Model Number: 577999