Aiment Cordless Impact Wrench 1/2 inch, 550 Ft-lbs Max Torque(700NM), 21V 3000RPM Brushless Power Impact Gun, 4.0Ah Li-ion Battery with Fast Charger, 6Pcs Sockets, Electric Impact Driver for Car Home - Amazon.com
Milwaukee M18 FUEL Gen-2 18V Lithium-Ion Brushless Cordless Mid Torque 1/2 in. Impact Wrench with (1) 5.0 Ah Battery 2962-20-48-11-1850 - The Home Depot