Stock up on these sturdy metal junction boxes for your next electrical project. This Copkim pack gives you 12 identical boxes, which is perfect for a big renovation, wiring a new room, or just having spares on hand. Each box is made from galvanized steel, so it's strong, durable, and resistant to rust. The size is a standard 4 inches by 2 inches (rectangular), giving you plenty of room for wiring connections, switches, or outlets. They come pre-punched with a bunch of knockouts: you get ten 1/2-inch knockouts and six 3/4-inch knockouts, making it easy to run conduit or cables into the box from different angles. The silver finish is clean and professional-looking. These are designed for new construction or remodel work where you need a solid, reliable enclosure for your electrical connections (and they're suitable for use in 2-hour fire-rated walls, which is a plus). Remember, they're just the empty boxes – devices and covers are sold separately. A great value pack for electricians, serious DIYers, or anyone needing quality metal boxes.