Performance: 1. Work efficiency, reliance and stable goods for a long time 2. Has a grip designed for ease of operation over long work periods 3. Running on low voltage, direct current, this tool is designed for safety. 4. Have high and low levels to choose 5. Wide torque adjustment. Specifications: Model no.: CL4000 Power Requirements: CLT-50 Output Torque Range: 1 - 5.5 Kgf.cm 0.1 - 0.55 N.m Torque switching: stepless adjustment Unloaded Rotation Speed (RPM) HI/LWO: 1000 / 690 Screw Size: Small screw: 1.4 - 2.6 Tapping screw: 1.4 - 2.3