--- product_id: 253382236 title: "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) | 3 in. Stop, Solid Brass, Satin Nickel, High Security" brand: "prime-line" price: "190 Lei" currency: RON in_stock: true reviews_count: 7 category: "Prime Line" url: https://www.desertcart.ro/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add store_origin: RO region: Romania --- # child-safe, tamper-resistant spring lock 3" hardened screws included 800 lbs force resistance 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) | 3 in. Stop, Solid Brass, Satin Nickel, High Security **Brand:** prime-line **Price:** 190 Lei **Availability:** ✅ In Stock ## Summary > 🛡️ Lock down your peace of mind with style and strength! ## Quick Answers - **What is this?** 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) | 3 in. Stop, Solid Brass, Satin Nickel, High Security by prime-line - **How much does it cost?** 190 Lei with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add) ## Best For - prime-line enthusiasts ## Why This Product - Trusted prime-line brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Unmatched Strength:** Engineered to withstand 800 lbs of brute force, securing your home against even the most determined intruders. - • **Sleek Satin Nickel Finish:** Modern aluminum construction with a satin nickel anodized finish that complements your stylish home décor. - • **Child-Safe & Tamper-Resistant:** Spring-loaded design installs high for child safety and blocks lock picking or bumping attempts. - • **Quick & Hassle-Free Installation:** Includes premium 3-inch hardened screws for a secure fit—get fortified in minutes, no pro needed. - • **Universal Fit for Swing-In Doors:** Works seamlessly on any door thickness, adding an extra layer of security where you need it most. ## Overview The PRIME-LINE Defender Security U 10827 Door Reinforcement Lock is a robust aluminum deadbolt lock designed to prevent forced entry by withstanding up to 800 lbs of force. Featuring a child-safe, tamper-resistant spring-loaded mechanism and easy installation with included 3-inch hardened screws, it fits any swing-in door thickness. Finished in satin nickel, it combines high security with a sleek, modern look to protect your home and family effortlessly. ## Description From the manufacturer Withstands up to 800 lbs of force! Use on primary entry doors to keep you and your family safe while inside Keep your home more secure while on vacation by installing these on secondary entrances such as back door or side doors Helps to prevent doors from being kicked in. Increases your home's security and gives your family extra peace of mind. Tamper resistant and child-safe design Installs in just minutes using 3" hardened screws Cannot be opened from the outside Requires Drill, 1/8 in. drill bit and phillips screwdriver Chisel may be required if door fits tightly against the jamb (mortised installation) Easy to lock & unlock Pinch lock from top & bottom Pull towards door Pull lock towards you Lock in fully open position Review: 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. Review: Its not a great product. - The screws that came along is a JOKE. Dont install those screws. IT is meant for butter boards. DISAPPOINTED.... ## Features - KEEP YOUR HOME SAFE – Designed to withstand 800 lbs. of force, this U 10827 satin nickel finish door reinforcement lock helps to prevent doors from being kicked in, increasing your home security and keeping you and your family safe! - EASY INSTALLATION – The included 3” hardened screws make installation a breeze – extra security and peace of mind can be achieved in just minutes! - ADDITIONAL HOME SECURITY - Use this high security door reinforcement lock for additional home security on any swing-in door of any door thickness. It helps to ensure any door cannot be opened from the outside. - CHILD-SAFE AND TAMPER-RESISTANT – This door reinforcement lock has a spring-loaded design that is both child-safe and tamper-resistant. It can be installed higher on the door where your children can’t reach! Plus, not only can doors not be kicked in by intruders, it protects against lock picking and bumping while in the locked position. - WATCH THE VIDEO ON THIS PAGE for installation tips and operating instructions. - For all dimensional information please refer to the line art and compare to your needs before purchasing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00D2K367Y | | Additional Features | Burglar Resistant, Child Safe, Withstands 800 Lbs of Strength, Spring-loaded Design | | Best Sellers Rank | #48,821 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Door Lock Replacement Parts | | Brand | PRIME-LINE | | Brand Name | PRIME-LINE | | Color | Satin Nickel | | Control Method | Touch | | Country of Publication | China | | Customer Reviews | 4.7 out of 5 stars 27,743 Reviews | | Finish Types | Satin Nickel | | Global Trade Identification Number | 00049793108272 | | Included Components | 3" hardened screws | | Item Dimensions | 6.4 x 3.5 x 7.6 centimeters | | Item Type Name | Door Reinforcement Lock | | Item Weight | 0.37 Pounds | | Item dimensions L x W x H | 6.4 x 3.5 x 7.6 centimeters | | Lock Type | Deadbolt | | Lock type | Deadbolt | | Manufacturer | Prime-Line Products | | Manufacturer Part Number | U 10827 | | Material | Aluminum | | Material Type | Aluminum | | Model Name | Door Reinforcement Lock | | Model Number | U 10827 | | Number of Pieces | 1 | | Recommended Uses For Product | Home security reinforcement, door reinforcement against forced entry | | Recommended uses for product | Home security reinforcement, door reinforcement against forced entry | | Shape | Rectangular | | Smart Home Compatibility | Not Smart Home Compatible | | Special features | Burglar Resistant, Child Safe, Withstands 800 Lbs of Strength, Spring-loaded Design | | Style Name | Lock | | UPC | 049793108272 | | Unit Count | 1 Count | ## Product Details - **Brand:** PRIME-LINE - **Item dimensions L x W x H:** 6.4 x 3.5 x 7.6 centimeters - **Lock type:** Deadbolt - **Material:** Aluminum - **Special features:** Burglar Resistant, Child Safe, Withstands 800 Lbs of Strength, Spring-loaded Design ## Images ![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) | 3 in. Stop, Solid Brass, Satin Nickel, High Security - Image 1](https://m.media-amazon.com/images/I/61qMtnKyOxL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Would the Fire Department have trouble entering a house with this lock in case of a fire?** A: 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. **Q: Does it only work when someone is inside?** A: 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. **Q: do the screws come with this, or if not, what size do I need to buy** A: 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 **Q: I bought this but cannot open it. Is mine defective or is there a trick to opening it?** A: 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect Security Door Blocker *by S***S on 2 April 2024* 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. ### ⭐ Its not a great product. *by H***S on 12 May 2021* The screws that came along is a JOKE. Dont install those screws. IT is meant for butter boards. DISAPPOINTED.... ### ⭐⭐⭐⭐⭐ Exactly like Description Unbreakable *by P***L on 8 January 2019* 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. ## Frequently Bought Together - Prime-Line U 10827 Door Reinforcement Lock – Add Extra, High Security to your Home and Prevent Unauthorized Entry – 3 In. Stop, Aluminum Construction, Satin Nickel (Single Pack) - Prime-Line U 10385 Door Strike, for Use with 5-1/2 In. and 6 In. Hole Spacing On Dead Latch and Deadbolt, Steel, Satin Nickel (Single Pack) - Hinge Outlet Satin Nickel Wood Screws, Heavy-Duty Screws for Doors, Cabinets, Furniture & DIY Projects (9 x 3 Inch – 24 Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ro/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add](https://www.desertcart.ro/products/253382236-prime-line-defender-security-u-10827-door-reinforcement-lock-add) --- *Product available on Desertcart Romania* *Store origin: RO* *Last updated: 2026-07-23*