The present invention is directed to an integrally molded wall box unit that includes an electrical box configured to receive at least one electrical device. The electrical box includes a front face portion configured to accommodate the at least one electrical device and an opposing back wall portion configured to accommodate electrical wiring. A gripper member includes a flange member, an arm member and a tooth member. The flange member is connected to a first side of the electrical box and extends outwardly in a direction substantially perpendicular to the first side. The arm member is connected to the flange member at a first end and extends in a direction substantially perpendicular to the flange member. The electrical box, the flange member, and the arm member are configured to receive a structural member disposed therebetween. The tooth member is disposed at a second end of the arm member. The tooth member extending in a direction toward the electrical box. The tooth member is configured to removably secure the unit to the structural member.