Описано тут - http://www.mastercity.ru/forums/dveri/t242882-kto-mozhet-pomoch-uluchshit-ustanovlennye-finskie-dveri-vrezannye-zamki-besyat-zvukom-zakryvaniya-nuzhny-magnitnye-ili-chto-to-eshche-luchshe/?p=5422381#post5422381
