House framers installing decking or subflooring all have a pair of kneepads—unless they've switched over to this Quik Drive system, which allows them to drive floor-level screws from standing height. Developed by Simpson Strong-Tie for use with their collated fasteners, the system consists of three parts: A DeWalt cordless driver, the extension barrel, and the subfloor attachment.

In this demo, you'll see the design of the tool is quite clever, and it certainly appears faster and easier to use than getting down on your knees:

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Hitachi—sorry, Metabo—makes a competing product, but I couldn't find a good demo video of it.