0.5'' x 0.5'' Licensed NdFeB Plate. Ni-Cu-Ni (Silver in Color) Plated, With 0.125'' Thru Hole. Magnetized Through the Thickness (Paralell to the hole), Poles On Flat Face Counterbore On South Side, Grade N40 Neodymium Rare Earth Magnet.
If you have a neodymium magnet application that requires you to fasten your magnets securely to a wall (or any surface for that matter) the CH500D-FS or FN is definitely something to take a look at. This powerful neodymium magnet has a counterbore hole that is perpendicular to the poles. This means that when the magnets poles (strongest points of a rare earth neodymium magnet) are on the sides with the hole. thru hole is counterbored on the South pole. This magnet works well with the CH500D-FN which is the same size and shape but has a counterbore on the North pole.