Festool 492523 Centrotec-Packersink w/Pilot Bit & Depth Stop, 3.5mm is an adjustable countersink drill bit featuring a -spinning depth stop designed for use with the Centrotec system. The Centrotec shank is compatible with both the Festool Centrotec System and all standard or keyless chucks, ensuring no-slip performance. This innovative system provides a seamless transfer of force, preventing bit slippage and protecting the drill bit from damage. With the Centrotec System, the drill's weight is reduced by nearly half a pound and its length shortened by almost 1.5 inches, ing greater ease of use. The system also allows for quicker and more secure bit changes d to other quick-change chuck systems. The 3.5mm countersink drill bit is fully adjustable and includes a depth stop that rotates ly to prevent burning or marring of finished surfaces. Its long, precision-milled hex shank eliminates wobble or runout during use, and the design saves money by allowing of just the bit rather than the entire assembly. Model Number: 492523