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Amazon [amazon.com] has 2-in-1 DeWalt Flextorq 10,13 mm X 2 in. L Black Oxide Double-Ended Nut Driver for $6.86. Shipping is free w/ Prime or on $35+.

Product Description from Amazon:[list][*]2-IN-1 FUNCTIONALITY: Get jobsite convenience with onboard storage that offers 2-in-1 versatility.[*]DURABLE DESIGN: Detachable sockets allow for the quick removal of metal shavings to help promote long life.