Festool 492536 Centrotec Torx Bit 30-100mm, 2-Pack Save time changing between drill and screw bits with the quick-change Centrotec System Reduce fatigue with the lightweight Centrotec chuck and decrease drilling/driving clearance with the compact design Centrotec bits extend directly into the drill spindle so they serve as an extension of the motor, significantly improving controllability and torque Zirconium Nitride (ZrN) coating provides excellent erosion resistance Precision milled shaft provides zero run-out