$54.99 DEWALT 18-Volt 1/4 in. (6.4 mm) Cordless Impact Driver (Tool-Only)-DC825B - The Home Depot
Dewalt XTREME 12V MAX Impact Driver, Cordless, 1/4-Inch, Tool Only DCF801B - Walmart.com 
Dewalt DCF887M2 20V 20 Volt 1/4 Impact Driver XR MAX Li-Ion 4.0Ah Brushless Kit | eBay
