Begin by measuring and marking the exact dimensions of the square on the box's surface, using a straightedge and a permanent marker for accuracy. Next, select an appropriate cutting tool, such as a utility knife, Dremel tool, or hole saw, depending on the thickness and type of. Choose from our selection of square electrical boxes, including outlet boxes and covers, weatherproof outlet boxes and covers, and more. more How to make Square hole in a Plastic Box This video shows how to cut a square hole in an electrical enclosure (Plastic Box) ::::::::::: SUPPORT CHANNEL. Polylok, Inc. is an international supplier for the precast concrete and onsite wastewater industries, producing high-grade septic tank Solution and product. Whether you are installing outlets, switches, lighting fixtures, or junction connections, box size directly affects wire fill capacity, device fit, and installation quality. This. Unique, innovative, versatile enclosure made of ABS or polycarbonate UL 94 V0 • Patented, innovative, hinged quick-release catch technology without screws: open with a screwdriver, close by hand • More than 25 sizes and 150 standard. They are non-corrosive, strong, and lightweight for easy handling.