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Singapore #1 Digital Letterbox Lock & Smart Mailbox Lock Service

Need a Digital Letterbox Lock or Smart Mailbox Lock in Singapore? Upgrade from old keys! We specialize in fast, affordable **installation** and **replacement** for all HDB & condo letterboxes. Choose a secure, keyless **digital mailbox lock** today!

Warranty Assurance: All our locks come with a 1-Year Seller Warranty with On-Call SupportSingapore's Only One!

Order Your Mailbox/Letterbox Digital Lock Now ↓

Our Digital, Smart & Mechanical Mailbox Locks

PRODUCT 1 - Battery-Free Mechanical Letterbox Lock Singapore

PRODUCT 1 - Battery-Free Mechanical Mailbox Lock (SGD 50 incl. install)

Fully mechanical—no batteries needed. Our best-selling **mailbox digital lock** is known for its superior quality and long-lasting durability, perfect for HDB and Condo letterboxes.

SGD50 In Stock Order Product 1
PRODUCT 2 - Password & Key Digital Letterbox Lock

PRODUCT 2 - Password & Key Mailbox Lock with Backup Key (SGD 55 incl. install)

Enjoy convenient passcode entry with a physical key for backup. Fully mechanical, this **letterbox digital lock** requires no batteries. Features a dedicated password retrieval mechanism. IMPORTANT: The included key is ONLY for password retrieval, it cannot unlock the letterbox directly.

SGD55 In Stock Order Product 2
PRODUCT 3 - Zinc Alloy Mechanical Digital Code Lock

PRODUCT 3 - Zinc Alloy Mechanical Code Lock (SGD 65 incl. install)

Made from a better and more durable zinc alloy material, this mechanical **digital code lock** features enlarged turn wheels for easy operation. Includes a password retrieval mechanism. IMPORTANT: If you forget the code, the included key is used to retrieve the password, not to open the lock. Available in Silver color only.

SGD65 In Stock Order Product 3
PRODUCT 4 - Smart Battery-Powered Digital Mailbox Lock

PRODUCT 4 - Smart Battery-Powered Digital Mailbox Lock (SGD 60 incl. install)

Upgrade to a modern **smart mailbox lock** with **Letterbox Digital Lock (PIN)** access. Get secure PIN codes with a battery life of over 12 months (Uses CR2032). This is a top choice for a **mailbox digital lock** upgrade. Available in Black color only.

SGD60 In Stock Order Product 4
PRODUCT 5 - Traditional Key Mailbox Lock Replacement

PRODUCT 5 - Traditional Key Mailbox Lock (SGD 50 incl. install)

Prefer the simplicity of a key? We also offer high-quality **traditional key lock replacement** for letterboxes. Robust, reliable, and comes with 2 new keys. Perfect for those who are not ready for a **digital mailbox lock**.

SGD50 In Stock Order Product 5
PRODUCT 6 - 4-Digit High Security Mechanical Mailbox Lock

PRODUCT 6 - 4-Digit High Security Mechanical Lock (SGD 75 incl. install)

Enhanced security with a 4-digit combination dial. Fully mechanical (No batteries). Features a retrieval key mechanism if you forget the code. More combinations mean higher security for your **HDB letterbox**.

SGD75 In Stock Order Product 6
PRODUCT 7 - 3-Digit Ergonomic Mechanical Mailbox Lock

PRODUCT 7 - 3-Digit Ergonomic Mechanical Lock (SGD 60 incl. install)

Designed with better ergonomics and a comfortable grip dial for easier turning. 3-digit combination, fully mechanical (No batteries). Includes key retrieval function. Perfect balance of comfort and security.

SGD60 In Stock Order Product 7
PRODUCT 8 - Horizontal Smart Battery Digital Lock

PRODUCT 8 - Horizontal Smart Battery Lock (SGD 65 incl. install)

A stylish horizontal design that fits perfectly on specific letterbox types. Battery-powered digital PIN access. Safe, durable, and modern aesthetic. (Uses CR2032).

SGD65 In Stock Order Product 8

Compare: Digital vs. Smart vs. Key Locks

Not sure which **letterbox digital lock** is right for you? Compare our top models below to find the perfect fit for your HDB or Condo mailbox.

Feature Prod 1 Prod 2 Prod 3 Prod 4 Prod 5 Prod 6 Prod 7 Prod 8
Type Mech Mech Mech (Zinc) Smart Key Mech (High Sec) Mech (Ergo) Smart (Horiz)
Price $50 $55 $65 $60 $50 $75 $60 $65
Unlock Code Code Code PIN Key 4-Digit 3-Digit PIN
Battery? No No No Yes No No No Yes
Retrieval Key? No Yes Yes No N/A Yes Yes No

Order Your Digital Mailbox Lock Now

Customer Details
Mailbox Lock Order Details

Service Coverage & Common Issues

We provide professional **digital letterbox lock installation** and **smart mailbox lock upgrades** islandwide. We solve all common problems, including **lost HDB letterbox key**, **mailbox lock replacement**, or if your **mailbox lock is spoiled**. We are your trusted **letterbox locksmith** in all HDB estates:

Ang Mo Kio, Bedok, Bukit Merah, Hougang, Jurong, Punggol, Sengkang, Tampines, Woodlands, Yishun, and all other areas in Singapore.

What Our Customers Say

"Excellent service! The technician arrived on time and replaced my HDB mailbox lock in under 20 minutes. The new digital lock is so convenient. Highly recommended!"

— Brenda Tan, Ang Mo Kio

"Lost my keys and was locked out of my condo letterbox. Called them for their emergency unlock service. They were fast, professional, and the price was very reasonable. Thank you!"

— Rajesh Kumar, Tampines

"The smart lock is a game-changer. I love the peace of mind knowing my mail is secure. Installation was seamless. Great job!"

— Siti Aishah, Punggol

"Very responsive seller on Carousell! Installation of the digital letterbox lock was quick and fuss-free. Lock works perfectly."

— User_ABC (via Carousell)

"Good quality digital lock for my HDB mailbox. Cheaper than other places. Recommended seller from Carousell."

— Buyer_XYZ (via Carousell)

Frequently Asked Questions (Mailbox Locks)

What should I do if I lost my HDB letterbox key?
If you've lost your HDB letterbox key, don't worry. Contact our 24/7 emergency service. We can either unlock your existing letterbox for a SGD 25 fee, or we can replace the entire lock with a new digital one, which includes the unlocking service. This is often the best time to upgrade to a keyless solution.
How much does it cost to change a mailbox lock in Singapore?
Our prices for changing a mailbox lock start from just SGD 50. This price includes the new lock and the full installation service. If your current lock is locked and you've lost the key, an additional SGD 25 unlocking fee applies.
What warranty do you provide?
All our digital and mechanical mailbox locks include a **1-Year Seller Warranty with on-call support** – **Singapore's Only One!**, giving you complete peace of mind.
How long does the installation take?
Installation is very fast, typically taking only 15–30 minutes. We provide on-call service, and our standard lead time is just 1–2 business days after you confirm your order.
Will you damage my letterbox?
No. Our technicians are professional locksmiths who use specialized tools to ensure a clean installation or replacement with no damage to your letterbox door.
Do your digital mailbox locks require batteries?
Our most popular password and key models (Product 1, 2, 3, 6, 7) are fully mechanical and do not require batteries. Only the "Smart Battery-Powered" locks (Product 4, 8) use CR2032 batteries, which last over 12 months.
What is "Retrieve Password" on some locks?
Our models like Product 2, 3, 6, and 7 have a password retrieval mechanism. This means if you forget your code, you don't need to break the lock. We can use a master key or tool to find your password for you. Crucially, this key cannot open the lock directly.
Can I replace my old mechanical lock with a digital one?
Yes, absolutely! Our service is primarily focused on replacing old, faulty, or key-based locks with modern digital and smart options. Our team ensures a perfect fit for nearly all HDB and condominium letterbox models.
Do you sell Traditional Key Locks?
Yes, we do! If you prefer a simple solution, our PRODUCT 5: Traditional Key Mailbox Lock is available for SGD 50, which includes installation and two new keys.
How secure are mechanical digital letterbox locks?
Mechanical digital locks are highly secure. Especially our Product 6 (4-Digit Lock), which offers thousands more combinations than standard 3-digit locks, making it extremely secure against guessing.
Do you provide emergency service outside of regular business hours?
Yes, we offer 24/7 on-call support for emergency services, especially for mailbox unlocking (SGD 25 fee applies). We understand that urgent issues like lost keys can happen anytime.

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