Technical Specifications Rated Input Power: 650 W No-Load Speed: 0–5, 000 RPM Maximum Torque: 12 Nm Bit Holder: 1/4' Internal Hexagon Weight: 1.4 kg Power Source: Corded Electric Self-Drilling Screw Diameter: Up to 6 mm Maximum Screw Diameter: 4 mm Voltage: 230 V Sound Pressure Level: 84 dB(A) Vibration: 1 m/s² Bosch confirms these specifications for the GTB 650 Professional. Description Drywall Screwdriver Bosch GTB 650 Professional is a powerful 650 W corded screwdriver designed for fast and efficient installation of drywall, light steel and sheet-metal applications. It operates at up to 5, 000 RPM and delivers 12 Nm maximum torque. The reversible depth gauge allows convenient unscrewing without removing the gauge, while the 1/4' internal hexagonal bit holder provides secure bit fitting. It can also be used with the Bosch screw auto-feeder for faster drywall installation. Ideal for: Drywall installation, gypsum-board fixing, light steel framing, sheet-metal work, construction and professional interior-work applications.