Festool 493426 Centrotec HSS Spiral Drill Bit Set, 5.5mm a precise, compact, and durable solution for drilling through wood, metal, and plastic. This set features precision-ground HSS steel that stays sharp longer, ensuring accurate hole drilling and extended service life. Designed around a replaceable drill bit that fits securely into a reusable Centrotec shank, it enables quick and efficient use with the Festool Centrotec Chuck System. The reusable Centrotec shank is also compatible with all three-jaw chucks, providing no-slip performance. The set includes three 5.5mm HSS spiral drill bits, a reusable Centrotec shank, a set screw, and an Allen wrench. The innovative Centrotec system improves force transfer between the drill and bit, eliminating bit slippage and damage. Its chuck design reduces weight by half a pound and shortens overall length by nearly 1.5 inches, making bit changes faster and more efficient than traditional keyless chucks, while virtually eliminating run out. This set also additional bits, with 10-packs available separately, ensuring long-term versatility and convenience. Model Number: 493426