Picks up nails, screws, wire, and much more. Nail magnets like this are sometimes called magnetic sweepers or roller magnet.

Heavy-duty, quick-release magnetic sweeper. For cleaning construction sites, shop aisles, loading docks, parking areas, and stables. Collects nails, screws, wires, staples, and other metal remnants. 48" handle with durable aluminum housing. Sweeper width 24".