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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. Pre-drilling – the included 3 in.
Do not use a drill driver with max torq setting to install the 3 in. Additional home security - use this high security door reinforcement lock for additional home security on any swing-in door of any door thickness.

Works perfect for kids and the elder. Deadbolt button can only allow admin users to access. New 3d fingerprint sensor digital door lock bring you a fast & best secure fingerprint recognition system.
Accuracy up to 99. 86%. Rechargeable batteries are not recommended, because most rechargeable battery's voltage is 1. 2v. Harfo smart door lock door thickness range: 1 3/8 inch to 2 3/16 inch 35mm-55mm thick. This front door lock's function can increase your privacy level significantly.


No hidden charges or long-term costs. No locksmith needed. 30-day money back guarantee, 1-year product warranty and a lifetime customer support following the date of purchase.
Door handle is reversible for both left and right handed doors. Generate passcode remotely and share it to your visitors. Easy installationeasy to install in minutes with just a phillips screwdriver. No extra drills needed. Rental hosts & homeownerssifely smart door lock is a great solution for airbnb short-term rental hosts, rental property management, and self-housing resident.

Share ekey or code remotely to your family, specific dates or periods of time. Connectivity: 2. 4ghz wifi 802. 11 b/g/n. Auto lock and auto unlock: smart Lock automatically locks as you leave and unlocks when you arrive at your door with your smartphone in your pocket.
Compatible with Apple Watch. Plus lifetime mechanical warranty and 18 months electronic warranty. Smart home integration: voice control with Alexa and Google Assistant. 6-in-1 keyless entry smart lock: touch and go 360° fingerprint ID + Anti-peep Keypad + Smartphone + Auto Unlock + Shake to Open + Mechanical Key.


No extra drills needed. No locksmith needed.
Homeowners & rental hostsgreat solution for airbnb & HomeAway short-term rental hosts, rental property management, and self-housing resident. Door handle is reversible for both left and right handed doors. Advanced 3d fingerprintunlock the door less than 03 seconds with our 3rd generation fingerprint access technology. Easy installationeasy to install in minutes with just a phillips screwdriver.

1. MUL-T-LOCK
#ad
Mul-T-Lock Cronus High Security Grade 2 Single Cylinder Dead-Bolt w/Thumb Turn 2-3/8 or 2-3/4 Adjustable Backset for Commercial And Residential Metal Or Wood Doors Stainless Steel
#adMUL-T-LOCK #ad - Drill and pick proof high security Mul-T-Lock cylinder With steel hardened pin with solid core steel rosette. Economical and cost effective when high security is needed. 3 mul-t-lock junior keys 008 keyway with one duplicate card To Make Duplicates key copy's included.More information #ad
Can be keyed alike or master a keyed - ul fire rated, ANSI Grade2- Mul-T-Lock is a ASSA ABLOY Group Brand. Fits doors from 1-3/8" inch35mm to 1-3/4" inch 45mm.Brand | MUL-T-LOCK #ad |
Manufacturer | Mul-T-Lock #ad |
Height | 4 Inches |
Length | 4 Inches |
Width | 3 Inches |
Part Number | 008J-MD1--D |
More information #ad
2. Defender Security
#ad
High Security to your Home and Prevent Unauthorized Entry – 3” Stop, Aluminum Construction Finish, Defender Security Satin Nickel U 10827 Door Reinforcement Lock – Add Extra
#adDefender Security #ad - Watch the video on this page for installation tips and operating instructions. Pull projection:1 inch. Screws as you can strip or break the heads. Width is 1 to 038 inch. Drill bit. Length is 2 to 019 inch. It helps to ensure any door cannot be opened from the outside.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. Pre-drilling – the included 3 in.
More information #ad
Security screws require holes to be pre-drilled with 1/8 in. 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. 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. Do not use a drill driver with max torq setting to install the 3 in. Additional home security - use this 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 | 1 Inches |
Weight | 0.37 Pounds |
Width | 2.43 Inches |
Part Number | U 10827 |
Model | U 10827 |
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
3. HARFO
#ad
HARFO Fingerprint Door Lock, Keyless Entry Door Lock, Door Lock with Keypad, Passcode Smart Lock for Office Home Silver, Keyless Entry Door Lock with Touchscreen and OLED Display
#adHARFO #ad - This keyless door lock needs 4pcs 1. 5v aa dry batteries No include. Up to 300 users max and allow owner to track entry record. Oled display + voice guide will walk you through the whole process.Works perfect for kids and the elder. Deadbolt button can only allow admin users to access. New 3d fingerprint sensor digital door lock bring you a fast & best secure fingerprint recognition system.
More information #ad
You can simply use the touchscreen to add or delete user on the device. All-in-1 flexibility keyless entry door lock, fingerprint +access card3 include + code4~12 digit + backup key + double verification to unlock. Accuracy up to 99. 86%. Rechargeable batteries are not recommended, because most rechargeable battery's voltage is 1. 2v. Harfo smart door lock door thickness range: 1 3/8 inch to 2 3/16 inch 35mm-55mm thick. This front door lock's function can increase your privacy level significantly.
Brand | HARFO #ad |
Manufacturer | HARFO #ad |
Height | 6.5 Inches |
Length | 7.2 Inches |
Weight | 5.6 Pounds |
Width | 5.9 Inches |
Part Number | HARFO-HL96 |
More information #ad
4. Mul- T-lock Junior
#ad
Mul-T-Lock Economic Junior Jimmy proof Rim Cylinder Deadlock 3 Keys With Card Included Bright Brass
#adMul- T-lock Junior #ad - Installs on doors from 1-3/8 in. To 2-3/8 in. Mul-t-lock junior 008 Keyway for high security. For use on commercial and residential doors. Self drilling screws included make install easier on metal doors. Thick. Used to prohibit forced entry by spreading of door frames.More information #ad
Brand | Mul- T-lock Junior #ad |
Manufacturer | Mul-T-Lock #ad |
Height | 5 Inches |
Length | 8 Inches |
Width | 2 Inches |
Part Number | 008J-JPST01-05-D |
Model | 008J-JPST01-05-D |
More information #ad
5. Sifely
#ad
Sifely Keyless Entry Door Lock, Digital Smart Door Lock Smart Lock, Keyless Door Lock, Biometric Door Lock, Passcode Code Door Lock, Keypad Entry Door Lock, Keypad Door Lock, Fingerprint Door Lock
#adSifely #ad - Due to lock size, you can lock/unlock your smart door lock anywhere anytime, double check the lock dimensions! Remote controlpaired with sifely wifi gateway Optional Add-on, Sold Separately, it may interfere with screen doors & existing deadbolts, set up codes remotely and check real-time access logs.No hidden charges or long-term costs. No locksmith needed. 30-day money back guarantee, 1-year product warranty and a lifetime customer support following the date of purchase.
More information #ad
Multiple ways to unlockadvanced 5-in-1 keyless Entry Smart Door Lock: Fingerprint + Code + Fob + Smartphone + Key. Satisfaction guaranteedapp/software is free to use forever. Door handle is reversible for both left and right handed doors. Generate passcode remotely and share it to your visitors. Easy installationeasy to install in minutes with just a phillips screwdriver. No extra drills needed. Rental hosts & homeownerssifely smart door lock is a great solution for airbnb short-term rental hosts, rental property management, and self-housing resident.
Brand | Sifely #ad |
Manufacturer | Sifely #ad |
Height | 1.12 Inches |
Length | 7 Inches |
Weight | 4 Pounds |
Width | 3 Inches |
Part Number | Sifely Smart Lock |
Model | Sifely Smart Lock |
Warranty | One Year Product Warranty |
More information #ad
6. ULTRALOQ
#ad
Deadbolt Lock Edition, ULTRALOQ Smart Lock U-Bolt Pro + Bridge WiFi Adaptor, Biometric Fingerprint and Keypad, Smart Door Lock Front Door, 6-in-1 Keyless Entry Door Lock with WiFi, Bluetooth
#adULTRALOQ #ad - Backed by ultraloq, world’s leading smart lock brand with more than 1 million happy American users. Diy installation: replace your current deadbolt with just a screwdriver. Works with IFTTT. Ip65 rated dust and weatherproof external Smart Lock built to withstand heat and cold.Share ekey or code remotely to your family, specific dates or periods of time. Connectivity: 2. 4ghz wifi 802. 11 b/g/n. Auto lock and auto unlock: smart Lock automatically locks as you leave and unlocks when you arrive at your door with your smartphone in your pocket.
More information #ad
Control your ultraloq smart lock anytime, guests or service people for permanent access, anywhere: Unlock, share access and see a Log of who's entered and exactly when they did remotely using smartphone App with WiFi Bridge included. Compatible with Apple Watch. Plus lifetime mechanical warranty and 18 months electronic warranty. Smart home integration: voice control with Alexa and Google Assistant. 6-in-1 keyless entry smart lock: touch and go 360° fingerprint ID + Anti-peep Keypad + Smartphone + Auto Unlock + Shake to Open + Mechanical Key.
Brand | ULTRALOQ #ad |
Manufacturer | ULTRALOQ #ad |
Height | 1.22 Inches |
Length | 2.95 Inches |
Weight | 3.06 Pounds |
Width | 2.95 Inches |
Warranty | 18 months electronic warranty and lifetime mechanical warranty |
More information #ad
7. MUL-T-LOCK
#ad
Mul-t-lock Junior Rim & Mortise Rimo Cylinder. Mul-t-lock Rim Mortise 2 Keys high Security Mortise Cylinder Brass
#adMUL-T-LOCK #ad - Supplied with 2 keys and card. High quality and pick proof rim and mortise Cylinder. Brass finish Gold Color. Works for most mortise locks, rim locks and panic device Hadware. Can not make key copies without singed card for maximum security.More information #ad
Brand | MUL-T-LOCK #ad |
Manufacturer | Mul-t-lock #ad |
More information #ad
8. samtechT
#ad
Sifely Smart Lock, Keypad Door Lock, Biometric Door Lock, Digital Smart Door Lock, Keyless Door Lock, Fingerprint Door Lock, Keypad Entry Door Lock, Keyless Entry Door Lock, Passcode Code Door Lock
#adsamtechT #ad - The most secured 5-in-1 keyless entry Smart Door Lock: Fingerprint + Passcode + Fob + Smartphone + Key. Due to lock size, sold separately, double check the lock dimensions! Remote control / wifi accesspaired with sifely wifi Gateway Optional Add-on, you can lock/unlock your smart door lock anywhere anytime, it may interfere with screen doors and pre-existing deadbolts, set up codes remotely and check real-time access logs.No extra drills needed. No locksmith needed.
More information #ad
30-day money back guarantee, 1-year product warranty and a lifetime customer support following the date of purchase. Satisfaction guaranteedapp/software is free to use forever. No hidden charges or long-term costs. Generate a passcode remotely w/o internet and share it to your visitors. Homeowners & rental hostsgreat solution for airbnb & HomeAway short-term rental hosts, rental property management, and self-housing resident. Door handle is reversible for both left and right handed doors. Advanced 3d fingerprintunlock the door less than 03 seconds with our 3rd generation fingerprint access technology. Easy installationeasy to install in minutes with just a phillips screwdriver.
Brand | samtechT #ad |
Manufacturer | Sifely #ad |
Height | 1.12 Inches |
Length | 7 Inches |
Weight | 4 Pounds |
Width | 3 Inches |
Part Number | Sifely Smart Lock - Latch |
Model | B0401 |
Warranty | One Year Product Warranty |
More information #ad
9. MUL-T-LOCK
#ad
Mul-T-Lock Interactive+ Cronus High Security Grade 2 Single Cylinder Dead-Bolt w/Thumb Turn 2-3/8 or 2-3/4 Adjustable Backset for Commercial and Residential Metal Or Wood Doors Oil Rubbed Bronze
#adMUL-T-LOCK #ad - Can be keyed alike or master a keyed - ul fire rated, ANSI Grade2- Mul-T-Lock is a ASSA ABLOY Group Brand. Drill, pick and bump proof High Security Mul-T-Lock cylinder.More information #ad
Fits doors from 1-3/8" inch to 1-3/4" inch. Includes two 2 mul-T-Lock Interactive+ keys and one key duplication card. High security dead bolt - key cylinder is drill, pick and bump resistant, unlike the cheaper version junior mul-t-lock deadbolt.Brand | MUL-T-LOCK #ad |
Manufacturer | Mul-T-Lock #ad |
Part Number | 206X-MD1-13-D |
Model | 206X-MD1-13-D |
More information #ad