Select high-quality waterproof electrical boxes with proper IP ratings to protect against moisture and dust. Follow a step-by-step process: mark the location, drill holes, insert anchors, and secure the box for a weatherproof fit. Gangable masonry boxes and partitions, extra deep one- to four-gang masonry boxes, and through-wall boxes with concentric conduit knockouts designed for use with concrete blocks. It can be used with finished floors made of wood, tile, vinyl, terrazzo, carpet and concrete in settings such as education, offices & health care. Arlington's 4x4 FSCB44 box and single-gang FSCB24 box, offer the simple way to install a steel electrical box inside a concrete block wall.