This Smart screwdriver handle features a swivel mechanism, allowing you to switch from standard configuration to T-handle.
The handle has been shaped both for ergonomics and to not roll on a flat surface.
It's by German tool manufacturer Felo, which has been making tools since 1878.
You can buy the handle alone ('Stateside they're sold by KC Tools for $29) and pop in your own 1/4" shafts.
If you opt to buy it as a set with Felo's shafts, which include a range of slotted, Philips, Hex, and Torx tips, it starts to get pricey ($120, metric or imperial) as the stuff is made at Felo's factory in Germany.
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