So, why doesn't Magellan offer the kind that fits into the strike plate and locks with a key? WORK AT HOME Join our WHOLESALE program and make up to 50% profit. Simple to install - just place behind any standard door or house entrance. When it is pushed or touched it makes a loud alarm noise. This device will not only activate an alarm but will prevent unwanted intruders from entering. The order site is secured using a Thawte SSL Web Server Certificate which encrypts all data to and from the site. On/Off switch activates and deactivates door stop alarm.