IVES 326A92 Mighty-MiteĀ® Heavy Duty Magnetic Catch - Clear Coated Aluminum
The closest item we could come up with would be something not unlike the IVES RL30-A US26D Roller Latch with ASA Strike - Satin Chrome Brass As seen here:
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and while some of its components are ferrous faced the exposed portions are made of brass in general.