Note to the Gorse Fox - when ordering from Mr Amazon, do check the quantities. The Gorse Fox wanted two magnetic catches... and looked them up on the aforementioned website. Catch was found, and quantity changed to 2.
A package was delivered. It seemed heavy. The Gorse Fox opened the package to find the two packets contains the magnetic catches... along with eleven further catches in each package. The Gorse Fox failed to notice that the packets contained 12 catches each. Doh!