HEX DRIVERS PRECISION 1/16 X 50MM SINGLE HEX Wiha Precision Metric Single Hex Drivers, 1/16 x 50 mm
I've been using the exact same driver for assembling a product I manufacture, for the last 6 years, and it is still in perfect condition after thousands of uses. I bought another one so that I didn't have to move it back and forth between my regular toolbox and my assembly station.
The other brands that use the 'ball ends' do not work as well. Ball ends are okay for getting into awkward spaces, but they don't make even contact with the screw and can strip it out; bad for assembly. I much prefer the straight hex end, like this has.
The rotating jewelers' handle works well: feels snug and precise without binding.
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