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Keep your home safe – designed to withstand 800 lbs. 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.

Pre-drilling – the included 3 in. It helps to ensure any door cannot be opened from the outside. Security screws require holes to be pre-drilled with 1/8 in. Keep your home safe – designed to withstand 800 lbs. 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.

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.
Keep your home safe – designed to withstand 800 lbs.

The maximum outside diameter round door knob that can be protected with this lock-out device is 2-7/16 inches. X 1-1/2 in. So it may fit loosely over some doorknobs with round, slender shafts.
Doorknob lock-out device – the defender security doorknob lock-out device can be placed directly over the doorknob to prevent access to the keyhole. Applications – this lock-out device is often used in evictions, home sales, rentals, in-home, on job sites, in-office storage knobs and more. The cylinder cannot be removed when the device is closed and locked.





Square spindles. Easy installation – installation is quick and easy.
Has glass, diecast and steel components. Fluted glass knob set - the e 2279 fluted glass door knob set is ideal for replacing or updating interior door hardware. Replace antique knob sets – this e 2279 mortise lock set is the perfect choice for replacing broken knobs on old or antique/vintage interior doors. This product is not recommended where young children are present.
1. Defender Security
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High Security to Your Home and Prevent Unauthorized Entry – 3” Stop, Defender Security Bronze U 11126 Door Reinforcement Lock – Add Extra, Aluminum Construction Anodized Finish
#adDefender Security #ad - Child-safe and tamper-resistant – this defender security door blocker by prime-line has a spring-loaded design that is both child-safe and tamper-resistant. Watch the video on this page for installation tips and operating instructions.Keep your home safe – designed to withstand 800 lbs. 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.
More information #ad
It helps to ensure any door cannot be opened from the outside. Of force, this u 11126 bronze 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 bronze anodized finish high security door reinforcement lock for additional home security on any swing-in door of any door thickness.Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 3 Inches |
Length | 2.5 Inches |
Weight | 0.35 Pounds |
Width | 1.37 Inches |
Part Number | U 11126 |
Model | U 11126 |
Warranty | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |
More information #ad
2. Defender Security
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Aluminum Construction Finish, High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Defender Security Brushed Chrome U 11325 Door Reinforcement Lock – Add Extra
#adDefender Security #ad - Of force, this u 11325 brushed chrome 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 brushed chrome finish high security door reinforcement lock for additional home security on any swing-in door of any door thickness.More information #ad
Drill bit. Watch the video on this page for installation tips and operating instructions. Child-safe and tamper-resistant – this defender security door blocker by prime-line has a spring-loaded design that is both child-safe and tamper-resistant. Pre-drilling – the included 3 in. It helps to ensure any door cannot be opened from the outside. Security screws require holes to be pre-drilled with 1/8 in. Keep your home safe – designed to withstand 800 lbs. 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.
Brand | Defender Security #ad |
Manufacturer | Prime-Line #ad |
Height | 6.44 Inches |
Length | 1.5 Inches |
Weight | 0.37 Pounds |
Width | 3.81 Inches |
Part Number | U 11325 |
Model | U 11325 |
More information #ad
3. Defender Security
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Defender Security Gold Anodized U 10826 Door Reinforcement Lock – Add Extra, Aluminum Construction Finish, High Security to Your Home and Prevent Unauthorized Entry – 3” Stop
#adDefender Security #ad - Additional home security - use this gold anodized finish high security door reinforcement lock for additional home security on any swing-in door of any door thickness. Child-safe and tamper-resistant – this defender security door blocker by prime-line 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.
More information #ad
Watch the video on this page for installation tips and operating instructions. It helps to ensure any door cannot be opened from the outside. Of force, this u 10826 gold 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! Extruded aluminum construction with a gold anodized finish may not match gold or brass finishes. Keep your home safe – designed to withstand 800 lbs.
Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 3 Inches |
Length | 1 Inches |
Weight | 0.35 Pounds |
Width | 2.43 Inches |
Part Number | RNTLS-PN-732135023 |
Model | U 10826 |
Warranty | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |
More information #ad
4. Defender Security
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Removeable and Easy to Use, Defender Security S 4180 Doorknob Lock-Out Device – Doorknob Lock with Key to Block Access to Keyhole, Fits Round Doorknobs with Max Diameter of 2-7/8”
#adDefender Security #ad - Removable – the durable diecast cylinder is held in place with an O-ring and is removable when the device is unlocked and open. It can be used in any situation where you want to prevent others with keys from unlocking the doorknob. Diecast construction. Note that the shaft cut-out is oval/oblong in shape and measures 1-3/4 in.The maximum outside diameter round door knob that can be protected with this lock-out device is 2-7/16 inches. X 1-1/2 in. So it may fit loosely over some doorknobs with round, slender shafts.
More information #ad
Gray painted finish. Dimensions – this lock-out device can protect round doorknobs that have a max diameter of 2-7/8”. This knob lock-out device is used to prevent access to a standard door knob. Covers keyhole – this doorknob security device is not designed to prevent turning an unlocked knob, but rather to block access to the locked keyhole, effectively keeping other keyholders out. Doorknob lock-out device – the defender security doorknob lock-out device can be placed directly over the doorknob to prevent access to the keyhole. Applications – this lock-out device is often used in evictions, home sales, rentals, in-home, on job sites, in-office storage knobs and more. The cylinder cannot be removed when the device is closed and locked.
Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 8 Inches |
Length | 2.31 Inches |
Width | 6 Inches |
Part Number | RNTLS-PN-732148271 |
Model | EP 4180 |
More information #ad
5. Defender Security
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Defender Security U 11316 Swing Bar Door Guard With High Security Auxiliary Lock, 1-Pack, Satin Nickel Finish
#adDefender Security #ad - Adds security to entry door and helps to prevent forced entry. Allows door to be opened slightly for viewing. Constructed from diecast zinc. Addition of thumb turn lock prevents use of emergency release tool to gain access.More information #ad
Easy to install using included fasteners. In case of emergency, the thumb turn will breakaway with approximately 100 lbs. Of force.Brand | Defender Security #ad |
Manufacturer | Prime-Line #ad |
Height | 2.49 Inches |
Length | 4.21 Inches |
Width | 1.25 Inches |
Part Number | U 11316 |
Model | U 11316 |
More information #ad
6. Defender Security
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Stainless Steel, Defender Security U 9553 Lock & Door Reinforcer, 2-1/8 in. x 2-3/8 in. x 1-3/4 in., Recessed
#adDefender Security #ad - Height. Fits 1-3/4 in. Fits 1-3/4 in. Stainless steel. Width x 4-1/2 in. Stainless steel. Stainless steel. Backset, 2-1/8 in. Backset, 3-7/8 in. Used to reinforce and repair doors to aide in preventing forced entry.More information #ad
Thick doors, 2-3/8 in. Bores, 3-7/8 in. Width x 4-1/2 in. Bores, 2-3/8 in. Used to reinforce and repair doors to aide in preventing forced entry. Height. Thick doors, 2-1/8 in.Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 4.5 Inches |
Length | 1.75 Inches |
Weight | 0.45 Pounds |
Width | 3.87 Inches |
Part Number | U 9553 |
Model | U 9553 |
Warranty | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |
More information #ad
7. Defender Security
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Black Painted Finish, Pack of 1, Twist-in, Defender Security S 4003 Sliding Door Lock, 1-9/16 in. Hole Spacing
#adDefender Security #ad - Easy to install. Prevents door from being pried open or lifted out. Aluminum bolt. Solid aluminum pin in a cast Zamac housing. Black painted finish.More information #ad
Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 1 Inches |
Length | 1.38 Inches |
Weight | 0.1 Pounds |
Width | 3.81 Inches |
Part Number | S 4003 |
Model | S 4003 |
Warranty | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |
More information #ad
8. Defender Security
#ad
1-Pack, Classic Bronze Finish, Defender Security U 11317 Swing Bar Door Guard With High Security Auxiliary Lock
#adDefender Security #ad - Easy to install using included fasteners. Allows door to be opened slightly for viewing. Addition of thumb turn lock prevents use of emergency release tool to gain access.More information #ad
Of force. In case of emergency, the thumb turn will breakaway with approximately 100 lbs. Adds security to entry door and helps to prevent forced entry. Constructed from diecast zinc.Brand | Defender Security #ad |
Manufacturer | Prime-Line #ad |
Height | 2.49 Inches |
Length | 4.21 Inches |
Weight | 0.56 Pounds |
Width | 1.25 Inches |
Part Number | U 11317 |
Model | U 11317 |
More information #ad
9. Defender Security
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Perfect for Replacing Broken Antique Lock Sets on Interior Doors, Features 2” Outside Diameter Knobs Brass Plated, Defender Security E 2279 Mortise Style Fluted Glass Door Knobs
#adDefender Security #ad - Outside diameter knobs with 1-15/16 in. Product info – these fluted glass door knobs are 2 in. Projection and 17/64 in. Some components may need to be purchased separately. Beautiful, classic design – the design of these clear glass fluted knobs with a brass plated finished knob base will fit perfectly into a vintage or antique style door.Square spindles. Easy installation – installation is quick and easy.
More information #ad
With beautiful classic fluted glass and brass plasted finish, it’s the perfect choice for your next project. X 3-1/2 in. Warning: glass knobs can break under pressure or accidental impact. Has glass, diecast and steel components. Fluted glass knob set - the e 2279 fluted glass door knob set is ideal for replacing or updating interior door hardware. Replace antique knob sets – this e 2279 mortise lock set is the perfect choice for replacing broken knobs on old or antique/vintage interior doors. This product is not recommended where young children are present.
Brand | Defender Security #ad |
Manufacturer | Prime-Line Products #ad |
Height | 2 Inches |
Length | 1.93 Inches |
Weight | 0.67 Pounds |
Width | 2 Inches |
Part Number | E 2279 |
Model | E 2279 |
Warranty | Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse. |
More information #ad