"I feel these door retainers are the best around for the price of them, they install very easy, they look good, and because they were so good i purchased 27 of these for my school. i work in a school so you can imagine fire regulations are very high on the list but these retainers tick all the boxes, After they have been installed you may have to adjust the setting on them because a vacuum cleaner noise was releasing the door retainer this was very easy to do just a simple turn of a screw which is on the front of the item. Cannot comment on reliability as have only had for a short period of time"
"We had a problem that people kept on propping open Fire Doors in our building. Not good, but how to solve the problem? Dorgard product was the answer. Releases doors when the fire alarm goes off and automatically releases all the doors at a preset time in the evening. Ingenious."