These diametrically magnetized discs are very powerful. They are magnetized perpendicular to the axis of the cylinder, so they will attract "side-to-side" with great force. They "feel" stronger and are a bit more difficult to handle than the axially magnetized cylinders of the same size.
This size is also available
axially magnetized as part number
DC6 and in Grade N52 with a Black Nickel plating as part number
DC6B-N52.