BTW, it looks like it’s intended to be a combination open/close sensor and keypad (I think that’s what the third piece is). If so, that’s a really dumb design unless the INTERNAL magnet piece is larger than the
US-mandated choke tube size.
Why?
ADA standards require that a keypad be placed where a child or someone in a wheelchair can reach it.
Accessibility Guidelines for Keypad/Card Reader Placement
Common sense and safety standards require that small magnets be placed where children and pets cannot reach it—these are hugely hazardous if swallowed.
So the design becomes an engineering impossibility if the magnet and keypad are at the same vertical height. Unless the magnet is too big to swallow. 