Product Description *Powerful electric wrench, multi-purpose, super power. *Equipped with tungsten steel shaft, high hardness, and high wear-resistance. *Brushless motors do not produce sparks during operation, and the motors do not wear out. *Suitable for construction site shelves, maintenance, woodworking, etc. Square drive: 1/2 inch Torque range: 0-1000nm Voltage: 21V Input power: 1280W Battery capacity: 3000 mAh x 1 Screw diameter: 22 No-load speed: 0-3200 rpm Maximum torque: 1000Nm Beat frequency: 0-4000 ipm Feature1: Provide fastening control for various applications, such as scaffolding, installation and manufacturing industries. Feature2: 1/2 inch square drive. Automatic stop mode. Feature3: After the bolts/nuts are loose enough, the reverse rotation automatic stop mode will stop impact and rotation within 0.2 seconds. Feature4: With 1000N.M high torque, continuously variable speed switch. Feature5: Tungsten steel shaft, high hardness and wear resistance. Fine workmanship and good performance. Specification: Material: Metal, plastic Type: Dual use Power Supply Voltage: 20V Maximum Torque: 1000nm Square Drive: 1/2" No Load Speed: 0-10000r/min Bolt diameter: 32mm Package Included: 1 x Impact Wrench 1 x UK Charger 2 x Battery 1 x Instrction Book 1 x Universal flexible shaft(Free Gift)