Festool Drill Bit, Repl. For 492523 - 3.5mm replacement bit for 492523 3.5mm adustable countersink drill bit with a free spinning depth stop. The Centrotec shank can be used with all three-jaw chucks for no-slip performance or in conjunction with Festool's Centrotec chuck system. With the Centrotec design there is a better transfer of force with no chance for bit slippage or marring of the drill bit. Reduce the weight of the drill by nearly ½ pound and the length by nearly 1-1/2?ö with the Centrotec system. Additionally the Centrotec system offers a quicker way of changing bits than a keyless chuck with less run out. Economically packaged in 5 piece pack.3.5mm replacement bit in a 5 piece pack for better savings.Manufactured from High Speed Steel for longer service life.Spur-less design with beveled chamfers that make the cleanest cuts possible .Sharpened flutes keep entry and exit holes clean and precise while reducing the potential for burning.Fits either Festool Centrotec chuck or standard chuck.