These low-profile magnets are designed to fit better with track using code 83 and code 75 rail. The height of the magnet has been reduced, keeping the height above rail level similar to that achieved with a standard magnet in code 100 track.

When the couplers are slackened the knuckles will open allowing the couplers to be parted. Then the Kadee magic comes into play, as the couplers will go into a coupling delay position, a tongue fitted to each each coupler prevents the knuckels from re-engaging and the train can be propelled clear of the magnet. Only when the train is finally separated do the knuckles re-centre ready for coupling again.