$58.99 MILWAUKEE 1/2 Cordless Impact Wrench Kit, 18.0 Voltage, 1400 ft.-lb. Max. Torque, Battery 
Kielder 18v 1/2 Inch Cordless Impact Wrench Gun 700NM Torque 2x Lithium Battery | eBay
DEWALT 20V MAX Lithium-Ion Cordless 1/2-inch High Torque Impact Wrench with Detent Pin (To 
