Would the Fire Department have trouble entering a house with this lock in case of a fire?

I have experience breaking doors. I’ve put locks like this or better on my house knowing it will slow the fire dept down a bit but like others have said we have tools that will break even this. A halligan tool in the right hands will get through this pretty quickly, however with a lot of noise and certainly will deter the average criminal. 800lbs is a good amount of force to withstand, I think a average 200lb fireman with a halligan tool is probably capable of 1000lbs Of force applied to a certain spot on the door. If you put the lock high or low that will make breaking That more difficult. But the hydraulic tools fireman carry go up to 5000lbs.

Does it only work when someone is inside?

I installed this on my front door. As others have said, you must be inside to lock it, and it cannot be locked or unlocked from the outside. So you have no access to the door from the outside when the lock is in place. I keep it locked all the time, even when I'm not home, because I go in and out through my back door. For extra safety and strength, I installed two of them on my front door, one about chest high and one about two feet from the floor. I did this because I have a glass panel on the top half of the door, so if a burglar breaks the window, the bottom blocker is out of reach. As extra security for my back door, I installed a security door (like a screen door except it's heavy gauge metal with its own handle lock and deadbolt).This door blocker is extremely well-made (heavy metal) and is a fantastic product. I highly recommend it.

do the screws come with this, or if not, what size do I need to buy

Yes screws come with this device don't use them they're garbage go buy yourself some good heavy duty three to four inch screws from the hardware store so you can get into the frame of the house not just a door frame it'll make this device a lot more sturdy

I bought this but cannot open it. Is mine defective or is there a trick to opening it?

Sometimes you are right. I had one defective out of three I received. The spring was loaded improperly which made the latch always to be in the open. Or if I forced it, the spring would dislodge and make it difficult to even close. And once closed it would not open. Now if that is the case then you need replacement. However, if you are trying to understand how it works, all you have to do is when the latch lodged in the recess, basically in its closed position, pull out as if you are navigating around the latch notch that stops it. So the idea is pull laterally first and then turn the latch around the notch. Hope that helps.

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Reviews

S**S

Perfect Security Door Blocker

This is the second Defender Door Blocker we bought,very strong ,virtually impossible to break open the lock from outside,easy to install,screws comes along with the pack.As this gives additional security for the door,its highly recommended,moreover there is no need to drill any holes on the door for installing this blocker as this is fitted to the door frame.Very good product.

2.04.2024

H**S

Its not a great product.

The screws that came along is a JOKE. Dont install those screws. IT is meant for butter boards. DISAPPOINTED....

12.05.2021

P**L

Originally I had watched a Facebook video my girlfriend had sent me about this new security product and i thought this has got to have a catch or be phony.... So what could $22 bucks hurt spending it to try this out so i bought it and the only thing i didnt not like is i got uline instead of prime-line not a big deal theyre all the same. I installed it shortly after recieveing it with my impact driver with the 3"inch screws supplied and then i got my girlfriend to lock it so that i could test its strength, i am 200+lbs 5"8 heavy frame 56% muscle fairly good shape and my cousin who is 5"10 about 200 we both hip checked as well as tried 10+ times to boot the door in with just that no lockes engaged and shoulder check it... Result im pretty sure that even if u have a good new solid house your hinges would give out before this thing will -Great buy -Good value -Super Strong ( no to brag but ive ripped exterior doors on a new house off by accident and this held up to me) -800LBS to bust it -Quality product -Easy installation(you will need an impact driver for this) All in all a great purchase & have reccomended this to my friends and family.

8.01.2019

N**U

Useful

12.05.2019

R**A

This is a great lock, it is not bulky, and does not take much space, but it goes on so securely. makes you feel much safer. really good buy.

27.01.2025

F**O

Sencillo, efectivo, facil instalacion. Muy recomendado!

12.06.2025

J**O

Muy practico

18.09.2023

ASIN	B00D2K367Y
ASIN	B00D2K367Y
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#35,419 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #28 in Door Lock Replacement Parts
Color	Satin Nickel
Country of origin	China
Customer Reviews	4.7 4.7 out of 5 stars (27,398)
Customer reviews	4.7 4.7 out of 5 stars (27,398)
Date First Available	13 June 2013
Date First Available	13 June 2013
Department	Unisex-Adult
Finish	Satin Nickel
Included components	3" hardened screws
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	168 g
Item model number	U 10827
Item model number	U 10827
Manufacturer	Prime-Line Products
Manufacturer	Prime-Line Products
Material	Aluminum
Number Of Pieces	1
Part number	U 10827
Plug Profile	Door Mount
Product Dimensions	6.35 x 3.51 x 7.62 cm; 167.83 g
Product Dimensions	6.35 x 3.51 x 7.62 cm; 167.83 g
Shape	Rectangular
Size	3 in.
Special Features	Burglar Resistant, Child Safe, Withstands 800 Lbs of Strength, Spring-loaded Design
Style	Lock

PRIME-LINE Defender Security U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction (Satin Nickel Anodized Finish)

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