Abstract: A plurality of essentially round wheel shaped magnets on an axle transverse to a handle. The magnets are polarized axially and positioned with like poles adjacent. The roller rake is rolled over a surface and sweeps a swathe clean of magnetically attractable debris. The roller rake is particularly suited for cleaning nails from grassy areas such as commonly found in re-roofing and other construction projects, and for sweeping large areas such as factory floors. The magnets are arranged to project a magnetic field before, under, and behind the operating head.