The DEWALT DCF622 XR Brushless Self Drilling Screwdriver is ideal for the quick fitting of metal roofing and other sheet metal applications. It's versa-clutch delivers a repeatable screw setting with minimum fuss. Fitted with a high torque brushless motor that drives screws up to 6.15mm diameter efficiently and effectively offering maximum run time and a compact tool. Durable, ergonomic design and rubber grip for improved user comfort. Specifications: Bit Holder: 6.35mm (1/4in).No Load Speed: 0-2,000/min.Max. Torque: 11/34Nm.Max. Screw Diameter: 6.15mm.Weight: 1.97kg.