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Amazon [amazon.com] has Klein Tools KNECT 16-in-1 Impact-Rated Hybrid Screwdriver/Nut Driver for $19.98. Shipping is free w/ Prime or on $35+.

Product Description from Amazon:[list][*]16-IN-1 TOOL: Includes 11 tips and converts to 2 nut driver sizes for a wide range of applications[*]IMPACT-RATED: Switch shaft from the handle to any impact driver[*]POWERFUL RARE-EARTH MAGNET: Bits and hex fasteners are held securely by powerful magnets in the shaft