... . The holes are centrally located. The countersunk ring allows for the magnet to be screwed onto another ... face. The countersink is only on one side of the ring magnet so the A version has ... other such that the countersunk faces are attracted, one ring has to be an A version and the ... N35AH220°C (428°F)Magnet ShapeDisc, Cylinder, Block, Ring, Countersunk, Segment, Trapezoid, Irregular shapes and more. ...