Powered by a rechargeable lithium-ion battery pack, the Cordless High-Torque Impact Wrench can reportedly deliver (depending on make/model) up to 1,000-foot-pounds of drilling or fastening torque and up to 1,400 foot-pounds of unfastening/loosening torque-significantly faster and more powerful than a standard impact wrench. Being cordless, it's not restricted by the hoses or cords of pneumatic or corded models. Again, depending on make/model, socket-receiving anvil size ranges from 1/4 inch to 1 inch and weight from 31/2 to 7 pounds. Most come with LED lighting, variable-speed trigger, and forward/reverse switch.