The box is the cabinet’s backbone: the stronger the better. I like heavy boxes with at least
½-inch-thick walls or structural rails that can be attached with screws to the wall studs. Box materials include medium-density fiberboard (MDF) and oriented strand board (OSB), but my favorite is plywood with dado or mortise joints and metal or wood corner braces for rigidity. High-quality cabinets have dovetail joints in the drawer boxes, and you’ll also have the option to match the interior finish to that of the exterior.