Multi-Surface MagnetThe Multi Surface Magnet comes with 7 wheels and a removable handle for easy storage. The optional rake loosens metal debris from grass or gravel, allowing the magnet to snap them up. Powerful magnets are enclosed in a heavy gauge aluminum shell. This magnet works well over concrete, grass, gravel, etc. Features: Snaps up hundreds of fasteners per sweeping Load release feature for easy removal of debris Adjustable sweeping height: 3 4 to 1 1 2 Works