A crimping tool, for attaching at least one wire to a connector, includes a housing, a first handle coupled to the housing, and a second handle coupled to the housing and movable relative to the first handle. The crimping tool also includes a working head coupled to the housing opposite the first and second handles. The working head includes an upper wall, an end wall, and a gap defined between the upper wall and the end wall. The crimping tool also includes a punch assembly slidable along the working head toward the end wall in response to movement of the second handle toward the first handle. The punch assembly is visible through the gap as the punch assembly slides toward the end wall.