Best Defender Security Door Knobs in 2026

Classic bronze plated steel

Ideal for use on interior latch sets

Designed for doors that are 1-3/8 inch to 1-3/4 inch thick

Please refer to the line art drawing for dimensions and compare with your needs before ordering

EASY INSTALLATION  – Installation is quick and easy. Some components may need to be purchased separately.

CAUTION - This door knob is made of glass. It can crack or break if banged against a wall or hit with a solid object. Broken glass is sharp and can seriously cut you. If knob cracks or becomes loose, replace immediately. DO NOT let children hang from this

REPLACE ANTIQUE LOCK SETS – This E 2293 Mortise lock set is the perfect choice for replacing broken knobs on old doors.

LOCK BOLT KEY – This entry door lock set can be used as a privacy lock on bedrooms, bathrooms and other interior doors - the lock bolt is key activated from both the inside and outside.

EASY INSTALLATION  – Installation is quick and easy. Some components may need to be purchased separately.

CAUTION - This door knob is made of glass. It can crack or break if banged against a wall or hit with a solid object. Broken glass is sharp and can seriously cut you. If knob cracks or becomes loose, replace immediately. DO NOT let children hang from this

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Satin nickel plated steel

Ideal for use on interior latch sets

Designed for doors that are 1-3/8 inch to 1-3/4 inch thick

Slotted head screwdriver required for installation

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Stamped steel construction with a satin nickel finish

Perfect for replacing old style or antique rosettes

Designed for old style or antique doors that require a spindle and knobs

Stamped steel construction

These knobs are constructed of wrought steel and come in a brass-plated finish

Use of these knobs is limited to interior doors. These knobs are not for use on exterior (entry) doors

Easy to install and secure with 2 choices of square spindles

A Phillips head screwdriver is required for installation

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Features a simple, one-button control and automatically powers off after 2 minutes of idle to prolong battery life

Easy to install with only a few simple tools

For further dimensional and specification information, please see the line drawing

Zinc plated steel construction

10-pack

No mounting hardware included

Constructed of stamped solid brass; polished finish

Includes two rosettes and four fasteners

Easy to install in less than 30 minutes with a few simple tools

These knobs are constructed of wrought steel and come in a satin nickel-plated finish

Use of these knobs is limited to interior doors. These knobs are not for use on exterior (entry) doors

Easy to install and secure with 2 choices of square spindles

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Classic bronze painted steel

Ideal for use on interior latch sets

Designed for doors that are 1-3/8 inch to 1-3/4 inch thick

Please refer to the line art drawing for dimensions and compare with your needs before ordering

Product 1: DIMENSIONS – This lock-out device can protect round doorknobs that have a max diameter of 2-7/16”. Note that the shaft cut-out is oval/oblong in shape and measures 1-3/4 in. x 1-1/2 in., so it may fit loosely over doorknobs with round, slender shafts.

Product 2: PREVENT ACCESS TO KEYHOLE – This door knob lock-out device prevents turning of knob and access to keyhole, ensuring others with a key are not able to unlock the door. For use with keyholes in round door knobs of up to 2-7/16 in. outside diameter.

Product 2: FOR RENTALS, EVICTIONS AND MORE – This lockout device is often used in evictions, rentals, home sales, job sites and in-home or office storage.

Product 2: QUICK, EASY INSTALLATION – Installation is quick and easy – just place door knob lock-out device over the door knob, lock and go!

Product 2: DURABLE CONSTRUCTION – With diecast construction and a gray painted finish, this lock-out device is built to last. Cylinder is held in place with an O-ring and is removable when device is open and unlocked. The cylinder cannot be removed when device is closed and locked.