Here we offer the popular size of 1" x 1/2" in 1/8" thickness with holes for two #6 flathead screws and in the strong N52 grade. Sold by the pair as our part number BX082CS-P-N52. One will have the north pole on the countersink side and one will have the south pole on the countersink side, so they will attract each other when they are screwed in place. This is also available in grade N42, BX082CS-P
These countersunk block magnets can be used for a wide range of applications including door closures and tool hangers.