My favorite tool: the Milwaukee M12 FUEL™ 1/4" Hex Impact Driver
Milwaukee M12 3/8 In. Cordless Drill/Driver Kit with (2) 1.5 Ah Batteries & Charger - Power Townsend Company
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
Milwaukee 2553-22 M12 FUEL 12-Volt Lithium-Ion Brushless Cordless 1/4 in. Hex Impact Driver Kit w/Two 2.0Ah Batteries, Charger & Hard Case - Amazon.com
Milwaukee M12 12V Lithium-Ion Cordless Drill Driver/Impact Driver Combo Kit with Two 1.5Ah Batteries, Charger and Bag (2-Tool) 2494-22 - The Home Depot