Pop-in old work electrical box

An electrical box comprising:

• a housing comprising:
• a closed end, an open end opposite the closed end, opposing first sidewalls, and opposing second sidewalls, the opposing first and second sidewalls extending from the closed end to define the open end;
• lateral tabs extending from the housing at the open end, wherein the lateral tabs are integral with the housing;
• at least one wall engagement member provided on each of the opposing second sidewalls, the at least one wall engagement member configured to engage an inner surface of a wall upon insertion of the housing into an opening formed in the wall, wherein a thickness of the wall at the opening is defined by a distance between the inner surface of the wall and an opposing outer surface of the wall, wherein:
• the lateral tabs contact the outer surface when the housing is located in the opening in the wall, and
• the at least one wall engagement member is substantially integral with the respective opposing first sidewall;
• and
• a second wall engagement member provided on each of the opposing second sidewalls, the second wall engagement member configured to engage an inner surface of a second wall having a second outer surface and a second thickness upon insertion of the housing into an opening formed in the wall, wherein the second thickness is greater than the first thickness.