This was the previous unit to the modern DR560 and it was made better with a metal gearbox and a nice comfortable trigger. it also is all ball and needle bearings except for the main output spindle so it is far better then the 1980's units. it also has a rotating brush card for full power in forward and reverse.\
and it may have more torque as it is 7 amps at 800 rpm verses the newer unit which is 7amp at 900 rpm

Black & Decker #DR550

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