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Prime-Line 1" Defender Security Patio Door Twist-In Action Lock Expired

$1.35
$4.47
+23 Deal Score
13,567 Views
Walmart has Prime-Line 1" Defender Security Patio Sliding Door Twist-In Action Lock (White, U9850) for $1.35. Shipping is free w/ Walmart+ (free 30 day trial) or on orders of $35+.

Thanks to Deal Hunter babgaly for posting this deal.

Product details:
  • For use on patio sliding door systems and some horizontal sliding windows
  • Securely locks door in the closed or ventilating position
  • Cast Zamak construct housing with white painted finish
  • 1/2 in. reach x 11/16 in. body height with 1-9/16 in. hole center spacing
  • When engaged, this lock prevents sliding and lifting of active panel and features an easy to operate twist-in action
  • All the necessary mounting hardware is included for a quick and easy installation
  • Used on horizontal sliding windows and patio sliding door systems as a secondary security locking device
  • 1/2 reach x 11/16 in. body height
  • White painted finish

Editor's Notes & Price Research

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  • About this product:
    • 4.3 out of 5 stars rating at Amazon based on over 400 customer reviews
  • About this store:
No longer available
  •  Amazon has Prime-Line 1" Defender Security Patio Sliding door Twist-In Action Lock (White, U9850) for $1.47. Shipping is free with Amazon Prime or on orders $25+.
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Original Post

Written by
Edited March 28, 2023 at 08:41 PM by
Amazon [amazon.com] has Prime-Line 1" Defender Security Twist-In Action Lock (White, U9850) for $1.47. Shipping is free with Amazon Prime or on orders $25+. OOS

Walmart [walmart.com] has Prime-Line 1" Defender Security Twist-In Action Lock (White, U9850) for $1.47. Shipping is free w/ Walmart+ (free 30 day trial [walmart.com]) or on orders of $35+.
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Score +23
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$1.35
$4.47
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Price Intelligence

Model: Defender Security U 9850 Lock, 1 inch, Zamac Cast Housing w/Aluminum Bolt, White, Twist-In Action

Current Prices

Sort: Lowest to Highest | Last Updated 4/26/2024, 10:34 PM
Sold By Sale Price
Amazon$6.58
About This Product
    Product Name: Defender Security U 9850 Lock, 1 inch, Zamac Cast Housing w/Aluminum Bolt, White, Twist-In Action
    Manufacturer: Prime-Line Products (Home Improvement)
    Model Number: U 9850
    Product SKU: B002UNNSWM
    UPC: 49793098504
    ASIN: B002UNNSWM
    Brand: PRIME-LINE
    Item Dimensions LxWxH: 0.669291 x 0.511811 x 1.574803 Inches
    Item Weight: 0.18 Pounds
    Item model number: U 9850
    Manufacturer: Prime-Line Products (Home Improvement)

    12 Comments

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    Featured Comments

    I had locks similar to these on my sliding glass doors. They work good, but keep in mind you have to drill several holes in your sliding glass door frames to install these. And make sure the drill bit doesn't hit the glass, or it will shatter.
    ·

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    Joined Nov 2016
    Deal Hunter
    > bubble2 5,243 Posts
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    babgaly | Staff
    03-28-2023 at 11:31 AM.

    Our community has rated this post as helpful. If you agree, why not thank babgaly | Staff

    03-28-2023 at 11:31 AM.
    Video [amazon.com] review from Amazon product page.
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    Last edited by babgaly | Staff March 28, 2023 at 06:10 PM.
    Joined Aug 2014
    L9999: You are wasted...
    > bubble2 882 Posts
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    slickdeal_hokage
    03-28-2023 at 05:28 PM.
    03-28-2023 at 05:28 PM.
    Amazon's shipping is sometime in May. Walmart ships this month.
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    > bubble2 2,798 Posts
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    EdEd1190
    03-28-2023 at 06:21 PM.

    Our community has rated this post as helpful. If you agree, why not thank EdEd1190

    03-28-2023 at 06:21 PM.
    I had locks similar to these on my sliding glass doors. They work good, but keep in mind you have to drill several holes in your sliding glass door frames to install these. And make sure the drill bit doesn't hit the glass, or it will shatter.
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    Joined Dec 2008
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    > bubble2 616 Posts
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    frugal23
    03-29-2023 at 08:29 AM.
    03-29-2023 at 08:29 AM.
    Quote from EdEd1190 :
    I had locks similar to these on my sliding glass doors. They work good, but keep in mind you have to drill several holes in your sliding glass door frames to install these. And make sure the drill bit doesn't hit the glass, or it will shatter.

    Anyway to tell how far the glass extends to the edge… noob dyier.
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    Joined Jul 2009
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    > bubble2 356 Posts
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    Big0range
    03-29-2023 at 08:45 AM.
    03-29-2023 at 08:45 AM.
    Quote from frugal23 :
    Anyway to tell how far the glass extends to the edge… noob dyier.
    It's hit or miss... if you miss there's no problem, if you hit the glass shatters. Cool


    But seriously folks... looking at the vid, this mounts so it's only intruding into the extreme corners of the door. Unless the sliding glass door has an unusually thin frame, it should be fine. To be extra safe, you can use a drill press (if you have one) or a collar on the bit (like this: https://www.amazon.com/Drixet-Dri...B073VS72R3) so it doesn't penetrate more than a fraction of an inch.
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    > bubble2 88 Posts
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    avram42
    03-29-2023 at 09:05 AM.
    03-29-2023 at 09:05 AM.
    I'll have to look at my sliding door when I get home, but could you put one of these on the "top" of the door so you could lock the door partially open? I have a doggy door insert in the track of the sliding glass door so as it is, this isn't useful unless I could lock it in that position.
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    Joined Nov 2017
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    > bubble2 266 Posts
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    DaktaDoom
    03-29-2023 at 09:55 AM.
    03-29-2023 at 09:55 AM.
    Damn, OOS Frown
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    > bubble2 1,198 Posts
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    kickerstarter
    03-29-2023 at 10:24 AM.
    03-29-2023 at 10:24 AM.
    If someone want to come in through the patio door, they just need to break the glass, right? It is not like the patio door is facing the front where every passer by can see.
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    > bubble2 2,468 Posts
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    misel00
    03-29-2023 at 10:27 AM.
    03-29-2023 at 10:27 AM.
    What is regular price on this on amazon?
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    Joined Mar 2018
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    > bubble2 320 Posts
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    619boy
    03-29-2023 at 11:50 AM.
    03-29-2023 at 11:50 AM.
    Quote from kickerstarter :
    If someone want to come in through the patio door, they just need to break the glass, right? It is not like the patio door is facing the front where every passer by can see.
    Yep, break the glass and they're in.
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    Joined Oct 2008
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    > bubble2 2,837 Posts
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    shjaythi
    03-30-2023 at 08:09 AM.
    03-30-2023 at 08:09 AM.
    Back in stock @ Amazon for $1.47 with Estimated delivery: June 4, 2023 - June 6, 2023
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