Festool's redesigned Driver/Drills are now more powerful and compact than ever, and they still feature the innovative interchangeable chucks for incredible versatility. Working in a confined space? Remove the chuck and use the 1/4" hex moter shaft bit holder, or the new CentroTec Quick Change chuck and the wide variety of Festool drill and driver bits. Need to work close to a wall or cabinet side? Use the Festool eccentric chuck or the right angle adapter sold separately. Of course, for the day to day activities, use the standard keyless three jaw chuck. To change from one to another, just retract or rotate the locking rings. The unique Festool Centrotec Quick Change system uses special 1/4" hex bits that have an extended shaft for increased stability and concentricity. While the current trend in cordless tools favors the 14.4 and 18 V models, these Festool drills really deliver for most woodworking tasks without the arm-numbing bulk and weight.