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I spent a lot of time with the smaller strikes trying to get them to work with the dead latch (two latch version on normal professional swinging doors as well as looking for a way to mount the strike inside of the hollow door frame.
This solves both problems and the large size of the strike (heightwise) is forgiving if you are slightly off on the adjustments.
I've bought about 4 different versions of the electronic strike until I found this one. It is a good product and perfect for my needs. I paired it with a electronic magnet lock at the top of the door, the combination is very secure.
This is exactly what I needed to add remote entry to a steel frame door. It fit right into the standard "D" plate cutout. It has been running at a daycare on the main entry door for 6 months with no issues. All the components are sturdy. I have used some other brands that cost 6X as much and work just the same at our other centers. I would definitely buy again and recommend to friends. All you really need is a power supply and a normally open pushbutton switch to make it work. I have mine rest at lock meaning when there is no voltage applied it's locked. Add a cheap intercom or a surveillance system and it's money for remote entry.
Nice that you can select power or no power mode to lock and unlock. I wired mine with the magnet up on top of door to have both locked with 12v applied, made door more solid when yanking on it. I plugged the controller into a battery UPS like you use on your computer to keep power during outages. It was a little sticky when unlocked so I sprayed it heavily with the spray can graphite and cycled it a few times to work it in, now it works great...probably need to spray again every couple of months.
After around three weeks of use, the internal parts that hold it closed began to distort because of soft metal. Eventually the door could be pulled open with moderate force. Upon disassembly, I found the latch could be opened more than 50% of the way because of the soft internal parts. Replaced it with a magnetic lock.
Very cheaply made. Too much play in the strike and extremely bulky. It took me over 3 hours to install because I needed to dig the jamb out and constantly adjust to compensate for the play in the the strike. You're better off buying and American made strike instead of this Chinese crap. This stike is not worth more than $15.
Very high quality unit. Built as well as the $300.00 latches. I was very impressed when we opened the packaging and seen what was inside. UPDATE! This unit was installed on an outside apartment gate, more than 2 years ago. It still operates as well as the day it was installed.
Bought a half dozen of these. Half have failed in just a few months. The unlocking mechanism appears to physically jam when triggered so the unit doesn't unlock randomly. Support doesn't answer: email@example.com. I've tested the electrical current is within spec, they're just cheap and bad.