Cut-in: The type of electrical box that you use when working with an already finished wall.
Plastic Adjustable: As the name suggests, this box is designed to allow adjustment of depth after the wall covering has been installed. The patented design allows for adjustment from 0 In. to 1-3/4 In. after installation. Ideal for new work or retrofit upgrade applications.
4" Square Boxes (4S): This handy box is usually mounted behind a wall and is used in a commercial electrical setting. The larger box allows for more receptacles or wire connections in a safe area.