Nut runner accessory for power tool

A nut runner, comprising:

• a housing that includes a first open ended slot having a first open end portion;
• a gear assembly received in the housing, the gear assembly including a plurality of gears;
• an input shaft that extends into the housing and transmits a rotary force to a first gear of the plurality of gears;
• a driver head coupled to a second gear of the plurality of gears, the driver head defining a second open ended slot having a second open end portion;
• and
• an alignment device moveably disposed in the housing that engages one of the plurality of gears to restrict rotation of the plurality of gears with the first open end portion and the second open end portion aligned.

A nut runner, comprising:

• a housing that includes a first open ended slot having a first open end portion;
• a gear assembly received in the housing;
• an input shaft that extends into the housing and transmits a rotary force to an input gear of the gear assembly;
• a driver head coupled to an output gear of the gear assembly, the output gear and the driver head defining a second open ended slot having a second open end portion;
• and
• an alignment device coupled to the housing and accessible from an exterior of the housing;
• wherein the output gear rotates in response to a manual manipulation of the alignment device such that the first open end portion and the second open end portion are brought into alignment with each other.