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🧲 Hold your space, command your flow — the magnetic door holder that means business.
The Seco-Larm DH-171SQ Flush-Mount Magnetic Door Holder delivers a robust 33-pound electromagnetic hold with tri-voltage compatibility (12/24 VAC/VDC, 120VAC). Designed for flush-mount installation, it features a sleek aluminum faceplate and fail-safe operation with no residual magnetism for effortless door release. Compatible with UL-listed Seco-Larm door closers, it offers easy armature plate adjustments and built-in voltage spike suppression, making it a reliable, professional-grade solution for controlled door management.
| Brand | Seco-Larm |
| Color | Silver |
| Exterior Finish | Aluminum |
| Installation Type | Flush-mount |
| Item Weight | 496 Grams |
| Material | Aluminum |
H**.
Still working after three years
I purchased this over three years ago for use with our home automation system. When the garage side door is opened the door holder magnetizes and holds the door open. When the power is turned off, the magnet shuts off and the door automatically closes. The power can be turned off using the local wall switch, lack of motion after a certain time or based on other scripted events.
P**T
Seco-Larm
The magnetic door holder was easy to install replacing an old one. That would not hold any more. It worked exactly an expected. I have no negatives.
D**R
Works.
Actually locks easier at an angle contact. The door is a heavy steel cage door.
A**R
Worked perfectly for replacement of broken one
I use this to hold a self closing gate and really missed it when the first one broke. This is almost an identical replacement to the original. the only con is the price. there are not many to choose from for this voltage.
K**N
Not what we were looking for
You have to connect this to electricity and we just didn’t read the product information correctly so it didn’t work for us!
A**R
Excellent
Hi I received my order and I am very satisfied customer excellence packaging extremely fast shipping I'm a returning customer Thanks again.
R**.
Works great
Good quality electromagnet. Larger than expected but works fine.
Trustpilot
3 weeks ago
5 days ago