3-in-1 corded screwdriver kit. DS534-AC provides configurations for a variety of applications. The high-speed, adjustable motor of the included SG4100 screwdriver is capable of speeds up to 4000 RPM, making it an ideal choice for driving 1-3 in. screws into subfloor, underlayment and drywall. The kit comes complete with SG4100 screwdriver, DS530 autofeed attachment, extension pole, 3 bits and storage bag.