1. A wire twisting tool comprising a housing having a generally flat base and a generally flat cover fastened to said base, an opening disposed in said housing and open to a peripheral surface thereof, a slotted twisting gear journaled for rotation in said opening, wherein said slot has a width which is less than twice the diameter of the wires to be twisted, a driving gEar journaled in said housing with its axis parallel to the axis of said twisting gear and arranged to drive said twisting gear, wherein said gears are confined between said base and said cover with the axis of said gears being perpendicular to said base and said cover, said driving gear having a shouldered shaft portion disposed externally of said housing and bracket means for securing the wire twisting tool to motor means having a driver releasably and matingly engageable with said shouldered shaft portion to rotate said driving gear.