eatures six modes for tackling any task - Max, hard, medium, soft, tex and assist mode. With assist mode in use, when fastening screws the driver starts slowly when trigger is fully depressed, in order to stabilise the screw. Once the driver begins to impact the speed is automatically increased to maximum RPM to drive home the screw. Assist mode is perfect for timber drilling, and Tex mode for metal drilling. Battery & Charger are sold separately.