My favorite tool: the Milwaukee M12 FUEL™ 1/4" Hex Impact Driver
Milwaukee M12 1/4 In. Brushless Hex Cordless Impact Driver Kit with (2) 1.5 Ah Batteries & Charger - Hemly Hardware
Milwaukee M12 Fuel Brushless Impact Driver Review
Milwaukee M12 12V Lithium-Ion Cordless Drill Driver/Impact Driver Combo Kit (2-Tool) with SHOCKWAVEDriver Bit Set (45-Piece) 2494-22-48-32-4023 - The Home Depot