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Defender Security S 4220 48 In., White Aluminum, Sliding Door Security Bar Lock (Single Pack)

4.5 4.5 out of 5 stars 174 ratings
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White
48 in.

Purchase options and add-ons

Brand PRIME-LINE
Special Feature Weather Resistant
Lock Type Key Lock
Item Dimensions LxWxH 1 x 48 x 1 inches
Material Aluminum

About this item

  • Used to secure sliding patio door
  • Works on inside or outside sliding doors
  • Can be cut to desired length
  • Extruded aluminum with a white finish
  • When not engaged, can be lifted out of the way
See more product details

Customer ratings by feature

Easy to install
4.8 4.8
Sturdiness
4.6 4.6

Frequently bought together

$15.29
Get it as soon as Sunday, Mar 31
In Stock
Ships from and sold by Amazon.com.
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Defender Security S 4220 48 In., White Aluminum, Sliding Door Security Bar Lock (Single Pack)
PRIME-LINE Defender Security S 4220 48 In., White Aluminum, Sliding Door Security Bar Lock (Single Pack)
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Price-19% $15.29
List:$18.99
$27.47$9.18-25% $11.95
List:$15.95
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Monday, Apr 1
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Easy to install
4.8
4.5
4.6
Sturdiness
4.6
4.6
3.9
Easy to lock
4.7
4.5
Sold By
Amazon.com
Amazon.com
Amazon.com
Rishon Enterprises Inc.
lock type
Key Lock
Deadbolt
Loop lock
Key Lock
number of items
1
1
1
material
Aluminum
Aluminum
Steel
shape
Square
Square
finish type
White
Bronze
Satin Nickel
Painted
weight
0.01 pounds
1 pounds
136 grams

From the brand


From the manufacturer

Product information

Technical Details

Additional Information

Warranty & Support

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Defender Security S 4220 48 In., White Aluminum, Sliding Door Security Bar Lock (Single Pack)


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Product Description

Product Description

This is a 48 inch sliding patio door security jamb bar. The security bar lock is constructed from extruded aluminum and comes finished in white. It features a stamped steel hinged retainer for the open position. Has a plastic retainer with key for the locked position.

From the Manufacturer

This security bar lock is constructed of an extruded aluminum bar with steel brackets, and it comes in a white-painted finish. This universal bar lock is non-handed and can be used on both left and right-handed patio sliding doors, regardless if the sliding panel is situated on the interior side or the exterior side of the frame. The square aluminum extruded bar measures 5/8 in. x 5/8 in. x 48 in. and it can be cut down to fit widths of smaller doors. These security bar locks feature a jimmy-proof construction, designed to help prevent would-be intruders from opening the sliding door. All fasteners, brackets and installation instructions are included with this item. Other colors available. For adjustable bars see model numbers: U 9920 & U 9921.

Customer reviews

4.5 out of 5 stars
4.5 out of 5
174 global ratings

Customers say

Customers like the ease of installation using the lock. For example, they mention it works well, is simple and strong, and requires no drilling. Customers are also impresseded with the quality, saying it's well designed for its task. As for the security, they say it makes the door more secure. As far as appearance, they like that it matches the finish of the door. That said, opinions are mixed on the fit.

AI-generated from the text of customer reviews

67 customers mention60 positive7 negative

Customers find the installation process of the lock to be easy. They mention that it comes with all the hardware, and the system is simple and strong. Some say that the holes match up and there is no need for drilling. Overall, customers are satisfied with the ease of installation and recommend the product to others.

"I have bought several of these security bars. Super easy to install, very sturdy and attractive...." Read more

"...To my surprise it was easily cut to fit and a breeze to install...." Read more

"...The bar installed with a little effort and definitely stops the door from being opened when it's in place...." Read more

"Works great. Pretty easy to install if you are moderately handy with tools...." Read more

58 customers mention51 positive7 negative

Customers like the quality of the lock. They mention that it works well, is easy to install, and is well designed for its task. They also say that it's a finely tuned piece of security equipment and should work for most sliding patio doors.

"This is a very good product. The difference in this product than most others that perform this function is that the bar has to be cut to length...." Read more

"Works great. Pretty easy to install if you are moderately handy with tools...." Read more

"...Works perfect, installs easily and will last the life of the door you install it on." Read more

"Not the easiest to install but works well." Read more

40 customers mention40 positive0 negative

Customers are satisfied with the security provided by the lock. They mention that it is sturdy, easy to assemble, and secures the door well. The lock is made well and is an unobtrusive security asset.

"...Super easy to install, very sturdy and attractive. No need to bend over to secure the door as these can be easily mounted at any height...." Read more

"...100% secure. It fit perfectly in my Andersen slider.2 screws go into the door jamb to secure the hinged bar part...." Read more

"...brackets/alarm and will be unable to open the door, but the security bar can we seen and acts as a deterrent because the burgular will "see" the bar..." Read more

"...The Velco does the same thing. This device make my wife feel a lot safer." Read more

16 customers mention13 positive3 negative

Customers like the appearance of the lock. They say it looks good, is strong, and matched the finish of the door. Some mention that the bronze matched their bronze door quite well, and the white color matched my doors perfectly. Overall, most are satisfied with the appearance and functionality of the product.

"...Super easy to install, very sturdy and attractive. No need to bend over to secure the door as these can be easily mounted at any height...." Read more

"...The bronze matched my bronze door quite well. I actually installed 6 of these and I got a lot better with each one...." Read more

"...We got the white which is a perfect match for typical vinyl window frames." Read more

"...They look good when deployed and match our white doors - I really don't even notice them. When folded up, they disappear into the door frame...." Read more

6 customers mention6 positive0 negative

Customers appreciate the value of the lock. They say it is a great product for the price.

"...The door barely moves when I try to open it now. It was also cheaper than the competition." Read more

"This is a very affordable solution for your sliding door if your internal lock is broken or if you just want additional security...." Read more

"...plain and simple nothing fancy. priced well for what it does. would recommend having this product." Read more

"...Simple and quick solution and a great value for the price." Read more

21 customers mention14 positive7 negative

Customers are mixed about the fit of the lock. Some mention it's easy to install and cut to fit, while others say that one of the pieces didn't fit exactly like it was supposed to. The plastic end caps are not flexible and the tolerances are too tight.

"...100% secure. It fit perfectly in my Andersen slider.2 screws go into the door jamb to secure the hinged bar part...." Read more

"...To my surprise it was easily cut to fit and a breeze to install...." Read more

"...But it took about an hour to install, and one of the pieces didn't fit exactly like it was supposed to, even though our door is pretty standard." Read more

"...Had to make one cut with the saw but that was not a problem. Fits like a glove and works great...." Read more

Best security bar.....EVER
5 Stars
Best security bar.....EVER
I have bought several of these security bars. Super easy to install, very sturdy and attractive. No need to bend over to secure the door as these can be easily mounted at any height. Bonus points for sleek storage when not in use. Best security bar ever!!
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Top reviews from the United States

Reviewed in the United States on October 25, 2023
Color Name: WhiteSize Name: 48 in.Verified Purchase
Customer image
5.0 out of 5 stars Best security bar.....EVER
Reviewed in the United States on October 25, 2023
I have bought several of these security bars. Super easy to install, very sturdy and attractive. No need to bend over to secure the door as these can be easily mounted at any height. Bonus points for sleek storage when not in use. Best security bar ever!!
Images in this review
Customer image Customer image
Customer imageCustomer image
Reviewed in the United States on December 27, 2013
9 people found this helpful
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Reviewed in the United States on August 19, 2020
Reviewed in the United States on May 30, 2014
4 people found this helpful
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Reviewed in the United States on October 16, 2016
2 people found this helpful
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Reviewed in the United States on May 28, 2015
Reviewed in the United States on May 16, 2014
9 people found this helpful
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Reviewed in the United States on September 9, 2019
Color Name: WhiteSize Name: 48 in.Verified Purchase